Abstract

An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a polyolefin-based polymer and an olefin-acrylate copolymer. The polyolefin-based polymer is represented by a formula (I): An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a polyolefin-based polymer and an olefin-acrylate copolymer. The polyolefin-based polymer is represented by a formula (I):  wherein R1 and R2 are selected from the group consisting of CH3, C2H5, and C3H7. The olefin-acrylate copolymer is represented by a formula (II): An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a polyolefin-based polymer and an olefin-acrylate copolymer. The polyolefin-based polymer is represented by a formula (I):  wherein R1 and R2 are selected from the group consisting of CH3, C2H5, and C3H7. The olefin-acrylate copolymer is represented by a formula (II):  wherein R is selected from the group consisting of COOCH3, COOC2H5, and COOC4H9.

IPC Classes  ?

• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 17/065 - Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick-film techniques, e.g. serigraphy

Abstract

An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic, and is laminated between a top metal layer and a bottom metal layer of the electrode layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a fluoropolymer. The fluoropolymer has a plurality of spherulites, and the fractal dimension of each spherulite is lower than 12.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

A protection device includes a meltable conductor, an electrode set, and a heating element. The meltable conductor has a core metal layer and a bottom covering layer with low melting point. The core metal layer has a first low melting point metal layer, a second low melting point metal layer, and a high melting point metal layer laminated therebetween. The bottom covering layer with low melting point is disposed on a bottom surface of the core metal layer. The electrode set has a first electrode and a second electrode respectively connected to two terminals of the meltable conductor. The heating element is disposed under the bottom covering layer, thereby heating up and blowing the meltable conductor in the event of over-voltage.

IPC Classes  ?

• H01H 85/055 - Fusible members
• H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive

Goods & Services

Resistors; Resistances, electric; Circuit breakers; Temperature controllers; Fuses; Wires of metal alloys [fuse wire]; Current overload protectors; Varistors; Temperature switches; Voltage surge protectors; Diodes; Semiconductor devices.

Abstract

An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic, and is laminated between a top metal layer and a bottom metal layer of the electrode layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a first fluoropolymer and a second fluoropolymer. The weight average molecular weight of the second fluoropolymer ranges from 630000 g/mol to 1100000 g/mol. The conductive filler is dispersed in the polymer matrix, thereby forming an electrically conductive path in the heat-sensitive layer.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic, and is laminated between a top metal layer and a bottom metal layer of the electrode layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a first fluoropolymer and a second fluoropolymer. The first fluoropolymer includes a first melting point, and the second fluoropolymer has a second melting point lower than the first melting point. The difference between the first melting point and the second melting point is smaller than 14° C. The second fluoropolymer has a second melt flow index ranging from 0.4 g/10 min to 0.7 g/10 min.

IPC Classes  ?

• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic, and is laminated between a top metal layer and a bottom metal layer of the electrode layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a first fluoropolymer and a second fluoropolymer. The first fluoropolymer has a first volume and a first melt flow index, and the second fluoropolymer has a second volume and a second melt flow index. The second melt flow index ranges from 0.4 g/10 min to 0.7 g/10 min and is lower than the first melt flow index, and a volume ratio by dividing the second volume by the first volume ranges from 0.4 to 0.6.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic, and is laminated between a top metal layer and a bottom metal layer of the electrode layer. The heat-sensitive layer includes a polymer matrix and a conductive filler. The polymer matrix includes a fluorine-containing copolymer, and its melting point ranges from 210° C. to 240° C. The conductive filler consists of carbon black solely, and is used to form an electrically conductive path in the heat-sensitive layer. In addition, the over-current protection device has a resistance-jump ratio ranging from 1.2 to 1.3 between 40° C. and 130° C.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

An over-current protection device includes an electrode layer and a heat-sensitive layer. The heat-sensitive layer contacts a top metal layer and a bottom metal layer of the electrode layer, and is laminated therebetween. In addition, the heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a polymer matrix and a conductive filler. The polymer matrix includes a first fluoropolymer, by which the over-current protection device has a starting jump temperature of resistance ranging from 184° C. to 192° C. The conductive filler includes carbon black and a metal compound, thereby forming an electrically conductive path in the heat-sensitive layer.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

An over-current protection device includes a heat-sensitive layer and an electrode layer. The electrode layer includes a top metal layer and a bottom metal layer, and the heat-sensitive layer attached therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a polymer matrix and a conductive filler. The polymer matrix includes a polyolefin-based homopolymer and a polyolefin-based copolymer. The polyolefin-based homopolymer has a first coefficient of thermal expansion (CTE), and the polyolefin-based copolymer has a second CTE lower than the first CTE. The polyolefin-based homopolymer and the polyolefin-based copolymer together form an interpenetrating polymer network (IPN).

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a polymer matrix and a first conductive filler. The polymer matrix includes a polyolefin-based polymer and a fluoropolymer. The fluoropolymer has a melt flow index higher than 1.9 g/10 min, and the polyolefin-based polymer and the fluoropolymer together form an interpenetrating polymer network (IPN). The first conductive filler has a metal-ceramic compound dispersed in the polymer matrix.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

An over-current protection device includes first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer includes a polymer matrix, and a conductive filler. The polymer matrix has a fluoropolymer. The total volume of the PTC material layer is calculated as 100%, and the fluoropolymer accounts for 47-62% by volume of the PTC material layer. The fluoropolymer has a melt viscosity higher than 3000 Pa·s.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a first polymer and a conductive filler. The first polymer consists of polyvinylidene difluoride (PVDF), and PVDF exists in different phases such as α-PVDF, β-PVDF and γ-PVDF. The total amount of α-PVDF, β-PVDF and γ-PVDF is calculated as 100%, and the amount of γ-PVDF accounts for 33% to 42%.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material

Abstract

An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a first polymer and a conductive filler. The first polymer consists of polyvinylidene difluoride (PVDF), and PVDF exists in different phases such as α-PVDF, β-PVDF and γ-PVDF. The total amount of α-PVDF, β-PVDF and γ-PVDF is calculated as 100%, and the amount of α-PVDF accounts for 48% to 55%. The conductive filler has a metal-ceramic compound.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

A circuit protection device includes a first temperature sensitive resistor, a second temperature sensitive resistor, an electrically insulating multilayer, a first and second electrode layer, and at least one external electrode. The first temperature sensitive resistor and the second temperature sensitive resistor are electrically connected in parallel, and have a first upper electrically conductive layer and a second lower electrically conductive layer, respectively. The electrically insulating multilayer includes an upper insulating layer, a middle insulating layer, and a lower insulating layer. The upper insulating layer is between the first upper electrically conductive layer and the first electrode layer. The middle layer is laminated between the first temperature sensitive resistor and the second temperature sensitive resistor. The lower insulating layer is between the second lower electrically conductive layer and the second electrode layer. The external electrode is disposed on the first electrode layer, and extends beyond a peripheral wall along a horizontal direction.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/01 - MountingSupporting
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

A circuit protection device includes a temperature sensitive resistor element, a dielectric layer, a first electrically insulating layer, a first electrode and a second electrode. The temperature sensitive resistor element has a first electrically conductive layer, a second electrically conductive layer and a positive temperature coefficient (PTC) layer disposed therebetween. The first electrically conductive layer has two electrically conductive blocks. The two electrically conductive blocks dispose on the surface of the PTC layer, thus forming a trench in the PTC layer. The dielectric layer is disposed in the trench. The first electrically insulating layer is disposed on the first electrically conductive layer and covers the dielectric layer. The first and second electrodes are disposed on the first electrically insulating layer, and electrically connected to the two electrically conductive blocks, respectively.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Abstract

3, wherein the M represents transition metal or alkaline earth metal. The total volume of the PTC material layer is calculated as 100%, and the titanium-containing dielectric filler accounts to for 5-15% by volume of the PTC material layer.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer includes a polymer matrix, a conductive filler and a titanium-containing inner filler. The polymer matrix has a fluorine-free polyolefin-based polymer. The titanium-containing inner filler has a compound represented by a general formula of MTiO3, wherein the M represents transition metal or alkaline earth metal. The total volume of the PTC material layer is calculated as 100%, and the titanium-containing inner filler accounts for 1-9% by volume of the PTC material layer.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

An over-current protection device includes a resistor element, an outer electrode, and an encapsulation layer. The resistor element has a first insulation layer, a first electrically conductive layer, a PTC material layer, a second electrically conductive layer and a second insulation layer stacked sequentially from bottom to top. The first insulation layer has a bottom surface and a first sidewall adjoining the bottom surface. The outer electrode has a first electrode and a second electrode disposed on the bottom surface. The first and second electrodes are electrically connected to the first conductive layer through the first and second vias, respectively. The encapsulation layer covers the first sidewall of the first insulation layer and extends to a part of the bottom surface, thereby forming a first perimeter on the bottom surface of the first insulation layer. The first and second electrodes are located inside the first perimeter.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

jump_1000@25V/50A of the over-current protection device at 25V/50 A by 1000 cycles is 0.90-1.30.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

A surface-mountable over-current protection device comprises at least one PTC material layer, a first conductive layer, a second conductive layer, a first electrode, a second electrode, an insulating layer, and a cover layer. The PTC material layer comprises crystalline polymer and conductive fillers dispersed therein. The first conductive layer and the second conductive layer are disposed on a first surface and a second surface of the PTC material layer, respectively. The first electrode and the second electrode are electrically connected to the first conductive layer and the second conductive layer, respectively. The insulating layer is disposed between the first electrode and the second electrode for insulation. The cover layer includes a fluorine-containing polymer, and wraps around an entire outer surface of the surface-mountable over-current protection device.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

bf of 0.0017˜0.0027Ω.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer matrix, a conductive ceramic filler, a carbon-containing conductive filler, and an inner filler. The polymer matrix comprises a fluoropolymer having a melting point higher than 150° C. The inner filler is selected from one of aluminum nitride, silicon carbide, zirconium oxide, boron nitride, graphene, aluminum oxide, or any mixtures thereof, and comprises 2-10% by volume of the PTC material layer. The over-current protection device is able to mitigate negative temperature coefficient (NTC) behavior after trip of device, and achieves high hold current and high endurable power.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

A vaporizer comprises an absorber, a heating element, and a porous cover layer. The absorber is configured to absorb a material to be vaporized. The heating element is configured to heat and vaporize the material to be vaporized in the absorber, and includes a first electrode portion, a second electrode portion, and an electrically conductive connecting member connected between the first electrode portion and the second electrode portion. The porous cover layer covers at least a portion of the heating element without covering the first and second electrode portions. A ratio of an area of the porous cover layer to an area of the electrically conductive connecting member is defined as a covering ratio, which is at least 50%. A porosity of the porous cover layer ranges from 30% to 75%.

IPC Classes  ?

• A24F 40/46 - Shape or structure of electric heating means
• A24F 40/44 - Wicks

Abstract

A vaporizer comprises an absorber and a heating element. The absorber is configured to absorb the material to be vaporized and comprises a plurality of first pores of a 100-500 nm diameter and a plurality of second pores of a 20-100 nm diameter. A ratio of the number of the second pores N2 to the number of the first pores N1 in a unit area, i.e., N2/N1, is 10-50%. The heating element heats and vaporizes the material to be vaporized in the absorber.

IPC Classes  ?

• A24F 40/44 - Wicks
• A24F 40/46 - Shape or structure of electric heating means

Abstract

A protection device comprises a substrate, a fusible element and a heating element. The substrate comprises a first electrode and a second electrode on its surface. The fusible element is disposed on the substrate and connects to the first electrode and the second electrode at two ends. The fusible element comprises a first metal layer and a second metal layer disposed on the first metal layer. The second metal layer has a lower melting point than that of the first metal layer. The heating element is disposed on the substrate. In the event of over-voltage or over-temperature, the heating element heats up to melt and blow the fusible element. The second metal layer is 40-95% of the fusible element in thickness.

IPC Classes  ?

• H01H 85/046 - Fuses formed as printed circuits
• H01H 85/08 - Fusible members characterised by the shape or form of the fusible member
• H01H 85/06 - Fusible members characterised by the fusible material
• H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
• H01H 85/46 - Circuit arrangements not adapted to a particular application of the protective device
• H01H 85/055 - Fusible members

Abstract

An over-current protection device comprises first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer comprises a polymer, an electrically conductive filler and a metal compound filler. The PTC material layer comprises the polymer of 50-70% by volume, and the electrically conductive filler and the metal compound filler are distributed in the polymer. The metal compound filler has a particle size D50 of 2-15 μm and 5-20% by volume and is selected from the group consisting of aluminum nitride, aluminum hydroxide, aluminum oxide, titanium oxide and zirconium oxide. The over-current protection device has a resistivity of 0.7-1.2 Ω·cm.

IPC Classes  ?

• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

A PTC device comprises a laminated substrate, a first PTC material layer, a second PTC material layer, a first metal layer and a second metal layer. The laminated substrate comprises a first conductive layer, a second conductive layer and an insulating layer laminated between the first and second conductive layers. The first PTC material layer is disposed on the first conductive layer, and the second PTC material layer is disposed on the second conductive layer. The first metal layer is disposed on the first PTC material layer, and the second metal layer is disposed on the second PTC material layer. The insulating layer has a through hole filled with PTC material to form a PTC connecting member of which one end connects to the first PTC material layer and another end connects to the second PTC material layer.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Goods & Services

Thermal interface materials in the nature of thermal conductive greases, namely, thermal paste Heat conductive materials, namely, thermal conductive paints; Thermal interface and coating materials, namely, thermal conductive ink for use in the manufacture of circuit boards and electronic devices Alumina metallic substrates having synthetic polymer thin film coatings in the nature of electrical insulation for use in the manufacture of electronic products; Alumina metallic substrates, namely, alumina panels for use in the manufacture of circuit boards; Thermal conductive insulated metallic substrates, namely, insulated metal substrates for use in the manufacture of circuit boards Electric circuit switches; Electric resistors; Electric resistances; Circuit breakers; Temperature sensors; Fuses for electric current; Fuse wires; Circuit overload protector devices; Varistors; Temperature switches; Voltage surge protectors; Diodes; Semiconductor devices; Circuit boards; Integrated circuit substrates, namely, circuit boards provided with integrated circuits; Printed circuit boards; Thermal conductive insulated metal circuit boards Insulators in the nature of insulating materials for electronic products; Insulating materials, namely, insulation ink for packaging; Insulating Coatings; Insulating Paints; Insulating varnish; Caulking materials; Thermal conductive Ink in the nature of insulating paints; Integrated circuit substrates, namely, films and sheets made from polymers for use in the manufacture of circuit boards; Thermal conductive insulated films and substrates made from polymers for use in the manufacture of circuit boards or electronic products; thermal interface materials, namely, electrically insulating thermal conductive films and pads made from polymer for use in the manufacture of electronic circuits or electronic products

Goods & Services

Switches; Resistors; Resistances; Circuit breakers; Temperature regulators; Temperature controllers; Fuses; Fuse wires; Current protectors; Varistors; Temperature switches; Voltage surge protectors; Diodes; Semiconductor devices; Circuit boards; IC substrates; Printed circuit boards; Alumina substrates for semiconductors; Thermal conductive insulating films; Thermal conductive insulating pads; Thermal conductive insulated substrates; Thermal conductive insulated metal circuit boards; Thermal conductive pads. Insulators; Insulating materials; Insulating Coatings; Insulating Paints; Insulating varnish; Insulation ink for packaging; Gap filling materials; Thermal conductive paints; Thermal conductive Ink; Thermal conductive greases.

Abstract

A protection device comprises a substrate, a fusible element, a flux and an insulating cover. The fusible element is disposed on the substrate and connects to a power line of an apparatus to be protected. The flux is disposed on the fusible element. The insulating cover is secured on the substrate to form a room for receiving the fusible element. The insulating cover has a bottom surface facing the substrate, and a plurality of protrusions are formed and distributed on the bottom surface to hold the flux in place.

IPC Classes  ?

• H01H 85/175 - Casings characterised by the casing shape or form
• H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
• H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive

Abstract

An over-current protection device is a hexahedron comprising an upper surface, a lower surface and four lateral surfaces. The over-current protection device comprises a PTC device, a first insulating layer, a first electrode layer and a second electrode layer. The PTC device comprises a first conductive layer, a second conductive layer and a PTC material layer laminated therebetween. The first conductive layer comprises a first conductive section and a second conductive section separated by at least one trench. The first insulating layer is disposed on the first conductive layer. The first electrode layer is disposed on the first insulating layer and electrically coupled to the first conductive section. The second electrode layer is disposed on the first insulating layer and electrically coupled to the second conductive section. The trench comprises a primary portion not parallel to a longitudinal direction of the first and second electrode layers.

IPC Classes  ?

• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

A cable comprises a power conductor, a data conductor and a first PTC device. The power conductor is configured to transmit electrical power between a source and a sink. The data conductor is configured to transmit data between the source and the sink. The first PTC device is coupled to the data conductor and its resistance increases drastically to decrease current flowing through the data conductor if a temperature of the first PTC device exceeds a first trip temperature. The first trip temperature is 55-80° C. The resistance of the PTC device is larger than 20 kΩ at 85° C. and larger than 80 kΩ at 100° C. A current flowing through the data conductor does not exceed 20 mA.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01R 107/00 - Four or more poles
• H01R 24/60 - Contacts spaced along planar side wall transverse to longitudinal axis of engagement
• H01H 1/04 - Co-operating contacts of different material
• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature

Abstract

A PTC device comprises a current and temperature sensing element, a first insulating layer, a second insulating layer, a first electrode layer and a second electrode layer. The current and temperature sensing device is a laminated structure comprising a first conductive layer, a second conductive layer and a PTC material layer. The first and second conductive layers are disposed on first and second surfaces of the PTC material layer, respectively. The second surface is opposite to the first surface. The first and second insulating layers are disposed on the first and second conductive layers, respectively. The first electrode layer is disposed on the first insulating layer and electrically connects to the first conductive layer. The second electrode layer is disposed on the second insulating layer and electrically connects to the second conductive layer. Corners of the current and temperature sensing device are provided with insulating members.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• G01K 7/22 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using resistive elements the element being a non-linear resistance, e.g. thermistor
• H01C 17/00 - Apparatus or processes specially adapted for manufacturing resistors

Abstract

A PTC device comprises a current and temperature sensing element, a first insulating layer, a second insulating layer, a first electrode layer and a second electrode layer. The current and temperature sensing element is a laminated structure comprising a first electrically conductive layer, a second electrically conductive layer and a PTC material layer. The first and second electrically conductive layers are disposed on first and second surfaces of the PTC material layer. The first and second insulating layers are disposed on the first and second electrically conductive layers. The first electrode layer is disposed on the first insulating layer and electrically connects to the first electrically conductive layer. The second electrode layer is disposed on the second insulating layer and electrically connects to the second electrically conductive layer. The first and second electrode layers serve as solder attach surfaces for soldering the PTC device onto a circuit board.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• G01K 7/16 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using resistive elements
• G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
• H01C 17/00 - Apparatus or processes specially adapted for manufacturing resistors

Abstract

A protection device comprises a first planar substrate, a second planar substrate, a heater and a fusible element. The first planar substrate comprises a first surface, and the second planar substrate comprises a second surface facing the first surface. The heater comprises a first heating element and a second heating element in parallel connection, and the first heating element is disposed on the first surface. The fusible element is disposed on the first surface and adjacent to the first and second heating elements, thereby the fusible element is melted by absorbing the heat generated by the first heating element and/or second heating element. The second heating element has a resistance at least twice that of the first heating element.

IPC Classes  ?

• H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
• H01H 69/02 - Manufacture of fuses
• H01H 85/20 - Bases for supporting the fuseSeparate parts thereof
• H01H 85/04 - Fuses, i.e. expendable parts of the protective device, e.g. cartridges
• H01H 85/041 - Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type

Abstract

A protection device comprises a first planar substrate, a second planar substrate, a heating element and a fusible element. The second planar substrate is attached to the underside of the first planar substrate to form a composite structure. The heating element comprises an insulating layer and a heating layer disposed thereon. The heating element is disposed on the first planar substrate, and the insulating layer is disposed between the first planar substrate and the heating layer. The fusible element is disposed above the heating element. The heating element heats up to blow the fusible element in the event of over-voltage or over-temperature.

IPC Classes  ?

• H02H 5/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
• H01H 85/46 - Circuit arrangements not adapted to a particular application of the protective device
• H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
• H05K 1/02 - Printed circuits Details
• H01H 85/046 - Fuses formed as printed circuits

Abstract

A reflowable thermal fuse comprises a conduction element with first and second elastic portions, a sensor, a restraining element, a heating element and mounting pads. The first elastic portion is adapted to apply force on the conduction element in an activated state of the thermal fuse. The sensor is in mechanical communication with the first elastic portion of the conduction element. The restraining element is adapted to secure the second elastic portion of the conduction element and thereby prevent the second elastic portion from applying force on the conduction element in an installation state of the thermal fuse. Application of an activating current through the heating element causes heat generated and transferred to the restraining element and makes the restraining element to lose resilience, thereby releasing the second elastic portion and placing the thermal fuse in the activated state. The sensor loses its ability to hold the first elastic portion in place and allows the conduction element to open during a subsequent fault condition.

IPC Classes  ?

• H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
• H01H 37/34 - Means for transmitting heat thereto, e.g. capsule remote from contact member
• H01H 37/64 - Contacts
• H01H 85/041 - Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type

Abstract

A surface-mountable over-current protection device comprises at least one chip, a first lead and a second lead. The chip comprises a PTC material layer and two metal electrode layers disposed on upper and lower surfaces of the PTC material layer. The first lead is bent into multiple portions comprising a first electrode connecting portion connecting to one of the two metal electrode layers of the at least one chip and a first soldering portion for surface-mounting. The second lead is bent into multiple portions comprising a second electrode connecting portion connecting to another one of the two electrode layers of the at least one chip and a second soldering portion for surface-mounting. The PTC material layer comprises crystalline polymer and conductive filler dispersed therein, and the conductive filler has a resistivity less than 500μΩ·cm. The surface-mountable over-current protection device can withstand a cycle life test of 300 cycles at 20V/40A without blowout.

IPC Classes  ?

• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 1/034 - HousingEnclosingEmbeddingFilling the housing or enclosure the housing or enclosure being formed as coating or mould without outer sheath
• H01C 1/16 - Resistor networks not otherwise provided for

Abstract

2.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• C09K 5/14 - Solid materials, e.g. powdery or granular
• C08L 27/16 - Homopolymers or copolymers of vinylidene fluoride
• C08L 23/06 - Polyethene

Abstract

A protection device comprises a first planar substrate, a second planar substrate, a heating element, a fusible element and an absorbent element. The first substrate comprises a first surface, and the second substrate comprises a second surface facing the first surface. The heating element is disposed on the first surface, and the fusible element is disposed above the heating element. The absorbent element is disposed on the second surface and above the fusible element. When over-current or over-temperature occurs, the heating element heats up to melt and blow the fusible element and the absorbent element absorbs melted metal of the fusible element.

IPC Classes  ?

• H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
• H01C 1/144 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors the terminals or tapping points being welded or soldered
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 7/12 - Overvoltage protection resistorsArresters
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H02H 7/085 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load

Abstract

A surface mountable over-current protection device comprises a PTC material layer, first and second conductive layers, left and right electrodes, left and right conductive members, and left and right insulating members. The PTC material layer comprises a left notch at a left end and a right notch at a right end. The first conductive layer comprises a primary portion disposed on an upper surface of the PTC material layer and a secondary portion extending over the left notch, and the second conductive layer comprises a primary portion disposed on a lower surface of the PTC material layer and a secondary portion extending over the underside of the right notch. The left conductive member connects to the left electrode and the first conductive layer and isolates from the second conductive layer. The right conductive member connects to the right electrode and the second conductive layer and isolates from the first conductive layer. The left and right insulating members are disposed in the left and right notches, respectively. The PTC material layer is not in direct contact with the left and right conductive members, and the primary portion and the secondary portion of the first or second conductive layer have different thicknesses.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

A protection device comprises a first substrate, a second substrate, a fusible element and a heating element. The first substrate comprises a first surface, and the second substrate comprises a second surface facing the first surface. The fusible element is disposed on the first surface of the first substrate, and the heating element is disposed on the second surface of the second substrate and is disposed above the fusible element. When over-voltage or over-temperature occurs, the heating element heats up to blow the fusible element and thereby providing over-voltage and over-temperature protection.

IPC Classes  ?

• H02H 3/24 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to undervoltage or no-voltage
• H01H 85/02 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive Details
• H01H 85/046 - Fuses formed as printed circuits
• H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature

Abstract

A connector comprises a terminal and a layered circuit substrate. The layered circuit substrate connects to an end of the terminal, and comprises a PTC material layer, a first electrode layer forming an upper layer of the layered circuit substrate, and a second electrode layer forming a lower surface of the layered circuit substrate. The PTC material layer is disposed between the first and second electrode layers. The first and second electrode layers comprise first and second electrode pads which connect to a power supply, and the PTC material layer electrically connects to the first and second electrode pads to form an electrically conductive path in which the PTC material layer serves as a PTC resistor in series connection between the first and second electrode pads. When over-current or over-temperature occurs in the electrically conductive path, the PTC resistor will trip to a high resistance state.

IPC Classes  ?

• H01R 13/66 - Structural association with built-in electrical component
• H01R 13/717 - Structural association with built-in electrical component with built-in light source

Abstract

An over-current protection device comprises a PTC device and a heating element operable to heat the PTC device. The PTC device contains crystalline polymer and metal or ceramic conductive filler dispersed therein. The PTC device has a resistivity less than 0.1 Ω·cm. The over-current protection device has the relation: It (heating)

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

An over-current protection device includes two metal foils and a PTC material layer laminated therebetween. The PTC material layer has a volumetric resistivity between about 0.07 Ω-cm and 0.45 Ω-cm. The PTC material layer comprises a crystalline polymer and first and second conductive fillers dispersed therein. The first conductive filler is carbon black powder. The second conductive filler is selected from the group consisting of metal powder and conductive ceramic powder and has a volumetric resistivity less than 0.1 Ω-cm. The weight ratio of the second conductive filler to the first conductive filler is less than 4. The resistance jump R300/Ri of the over-current protection device is in the range from 1.5 to 5, where Ri is an initial resistance and R300 is a resistance after tripping 300 times.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

A PTC composition comprises crystalline polymer and conductive filler. The conductive filler comprises tungsten carbide powder dispersed in the crystalline polymer, and the tungsten carbide powder comprises impurity of less than 7% by weight. The impurity comprises the materials other than tungsten monocarbide.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01B 1/20 - Conductive material dispersed in non-conductive organic material
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material

Abstract

A secondary battery supplying electrical power to a load comprises a battery unit, at least one PTC temperature sensing device and a load switch. The battery unit is encompassed by a battery shell. The PTC temperature sensing device is disposed on a primary surface of the battery shell to effectively sense a temperature of the battery unit. The load switch connects to the battery unit and a load and determines whether the battery unit and the load switch are in electrical connection or in an open circuit state upon resistance variation of the PTC temperature sensing device. When the resistance of the PTC temperature sensing device increases by a threshold times within a specific temperature variation or time period, the load switch receives a control signal and accordingly switches to an open circuit state.

IPC Classes  ?

• H01M 10/637 - Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devicesControl systems characterised by control of the internal current flowing through the cells, e.g. by switching

Abstract

2, the hold current at 60° C. is 40-95% of the hold current at 25° C., and the trip temperature of the PTC device is less than 95° C.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H01C 17/065 - Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick-film techniques, e.g. serigraphy
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

2.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H01C 1/144 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors the terminals or tapping points being welded or soldered
• H01C 17/065 - Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick-film techniques, e.g. serigraphy
• H01C 1/028 - HousingEnclosingEmbeddingFilling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath

Abstract

An over-current protection device adapted to be soldered onto a circuit board comprises a PTC material layer, a first electrode foil, a second electrode foil, a bonding section and a metal connecting member. The PTC material layer has opposite first and second surfaces. The first electrode foil is in physical contact with the first surface, and the second electrode foil electrically connects to the second surface. Both the second electrode foil and the bonding section are disposed on bottom of the device, and the bonding section is separated from the second electrode foil. The metal connecting member is disposed on the lateral surface of the device. The second electrode foil is adapted to be soldered onto an electrode section of the circuit board. The bonding section and the metal connecting member connect to corresponding joint section of the circuit board.

IPC Classes  ?

• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H05K 3/34 - Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

An anti-surge over-current protection device comprises a PTC material layer, first and second conductive layers. The PTC material layer has opposite first and second planar surfaces. The first conductive layer is in physical contact with the first planar surface and comprises a plurality of first conductive members isolated from each other. The second conductive layer is in physical contact with the second planar surface, and comprises a plurality of second conductive members isolated from each other. The first conductive layer, the PTC material layer and the second conductive layer form a circuit containing first and second conductive paths. In the first conductive path, the PTC material layer forms a first series connection resistive component having at least two resistors. In the second conductive path, the PTC material layer forms a second series connection resistive component having at least two resistors.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

8 times that at 25° C.

IPC Classes  ?

• H05B 33/00 - Electroluminescent light sources
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
• H01C 17/065 - Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick-film techniques, e.g. serigraphy

Abstract

An over-current protection device comprises a PTC device, first and second electrodes, a first welding metal plate and a second welding metal plate. The PTC device comprises a first conductive layer, at second conductive layer and a PTC polymeric material layer laminated therebetween. The first electrode electrically connects to the first conductive layer. The second electrode electrically connects to the second conductive layer and is separated from the first electrode. The first welding metal plate is formed on an upper surface of the device and connects to the first electrode. The second welding metal plate is formed on the upper surface or a lower surface of the device and connects to the second electrode. The first and second welding metal plates are placed at two opposite ends of the strip-like structure, and each of them has a thickness sufficient to withstand spot-welding without significant resultant damage to the PTC device.

IPC Classes  ?

• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

An over-current protection device, which can be surface-mounted and stand upright on a circuit board and withstand 60 to 600 volts, comprises a PTC device, first and second electrodes. The PTC device is a laminated structure comprising first and second conductive layers and a PTC material layer. The first and second conductive layers are in physical contact with first and second planar surfaces of the PTC material layer, respectively. The first electrode is disposed on the first conductive layer. The second electrode is disposed on the second conductive layer and is separated from the first electrode. The first electrode, the second electrode and the PTC device commonly form an end surface which is substantially perpendicular to the first and second planar surfaces. The first electrode and the second electrode at the end surface serve as interfaces electrically connecting to the circuit board.

IPC Classes  ?

• H05K 1/16 - Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
• H05K 7/00 - Constructional details common to different types of electric apparatus
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H05K 1/02 - Printed circuits Details
• H05K 1/03 - Use of materials for the substrate
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

A surface mountable over-current protection device comprises one PTC material layer, first and second conductive layers, first and second electrodes, and an insulating layer. The PTC material layer comprises crystalline polymer and conductive filler dispersed therein. The first and second conductive layers are disposed on first and second planar surfaces of the PTC material layer, respectively. The first and second electrodes are electrically connected to the first and second conductive layers. The insulating layer is disposed between the first and the second electrodes for insulation. At the melting point of the crystalline polymer, the CTE of the crystalline polymer is greater than 100 times the CTE of the first or second conductive layer, and the first and/or second conductive layers has a thickness which is large enough to obtain a resistance jump value R3/Ri less than 1.4.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Abstract

A surface mountable over-current protection device having upper and lower surfaces comprises a PTC device, first and second electrodes, and first and second circuits. The PTC device comprises a PTC material layer and first and second conductive layers. The PTC material layer is disposed between the conductive layers and comprises crystalline polymer and conductive filler dispersed therein. The first electrode comprises a pair of first metal foils, whereas the second electrode comprises a pair of second metal foils. The first circuit connects the first electrode and conductive layer, and has a first planar line extending horizontally. The second circuit connects the second electrode and conductive layer, and has a second planar line extending horizontally. At least one of the planar lines has a thermal resistance sufficient to mitigate heat dissipation by which the over-current protection device undergoes a test at 25° C. and 8 amperes can trip within 60 seconds.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 17/00 - Apparatus or processes specially adapted for manufacturing resistors
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/146 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors the resistive element surrounding the terminal
• H01C 17/065 - Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick-film techniques, e.g. serigraphy

Abstract

2.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/08 - Cooling, heating or ventilating arrangements
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
• H01C 17/065 - Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick-film techniques, e.g. serigraphy

Abstract

A surface-mountable over-current protection device comprises a PTC material layer, first and second conductive layers, first and second electrodes, first and second electrically conductive connecting members. The PTC material layer has a resistivity less than 0.18 Ω-cm. The conductive layers are in contact with opposite surfaces of the PTC material layer. The first electrode comprises pair of first metal foils and is insulated from the second conductive layer. The second electrode comprises a pair of second metal foils and is insulated from the first conductive layer. The first electrically conductive connecting member connects to the first metal foils and conductive layer. The second electrically conductive connecting member connects to the second metal foils and conductive layer. The first electrically conductive connecting member comprises 40%-100% by area of the first lateral surface, and the second electrically conductive connecting member comprises 40%-100% by area of the second lateral surface.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• H01C 7/12 - Overvoltage protection resistorsArresters
• H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Abstract

An over-current protection device comprises a PTC material layer, a first electrode layer and a second electrode layer. The PTC material layer has opposite first and second surfaces and opposite first and second lateral surfaces. The first electrode layer is in physical contact with the first surface of the PTC material layer and extends to the first lateral surface. The second electrode layer is in physical contact with the first surface of the PTC material layer and extends to the second lateral surface. The second electrode layer is insulated from the first electrode layer by a first separation. The first electrode layer and the second electrode layer are substantially laterally symmetrical, and serve as interfaces for current flowing in and out of the device when the over-current protection device is in use.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

An over-current protection device is of an approximately quadrilateral structure with upper and lower surfaces, first and second side surfaces, in which the second side surface contains a bevel. The device comprises first and second electrodes, a first PTC material layer, and first and second conductive connecting members. The first electrode is formed on the upper or lower surface. The second electrode is formed on the lower surface and is insulated from the first electrode. The first PTC material layer extends along the upper surface, and has a first surface electrically coupled to the first electrode, and a second surface electrically coupled to the second electrode. The first conductive connecting member is formed on the first side surface and is electrically coupled to the first electrode. The second conductive connecting member is formed on the second side surface and extends along the bevel to electrically couple to the second electrode.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
• H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
• H01C 1/148 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors the terminals embracing or surrounding the resistive element
• H01C 7/18 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material comprising a plurality of layers stacked between terminals
• H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors

Abstract

An LED apparatus includes an LED component and a current-limiting device. The LED component includes at least one LED having a corresponding current-limiting resistance value. The current-limiting device includes a plurality of PTC devices connected in series. The plurality of PTC devices are capable of effectively sensing the temperature of the LED and are electrically coupled to the LED component. The resistance value of the current-limiting device increases with the increment of sensed temperature. The current-limiting device has a resistance close to or equal to the current-limiting resistance value at a temperature at which the LED operates normally. When the temperature of the LED gradually increases to an abnormal temperature, current allowable to be flowed through the current-limiting device gradually decreases to be lower than LED operating current.

IPC Classes  ?

• H05B 37/02 - Controlling

Abstract

2. The ratio of the hold current of the thermistor at 60° C. to the hold current at 25° C. of the thermistor is 40-95%.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

An over-current protection device comprises a resistance material with positive or negative temperature coefficient and an upper surface and a lower surface; a first electrode layer having a first groove, disposed on the upper surface; a first surface mount pad disposed on the upper surface; a second electrode layer disposed on the lower surface, electrically connecting to the first surface mount pad; a second surface mount pad disposed on the lower surface, electrically connecting to the first electrode layer; a second groove electrically separating the first surface mount pad from the first electrode layer; and a third groove electrically separating the second electrode layer from the second surface mount pad. The first groove divides the first electrode layer into two connected regions. The first and second surface mount pads are separated from each other and one end of the first groove connects to the second groove.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

An over-current protection device includes two metal foils and a PTC material layer. The PTC material layer is laminated between the two metal foils and has a resistivity less than 0.4 Ω-cm. The PTC material layer includes crystalline polymer and electrically conductive ceramic filler dispersed in the crystalline polymer. The conductive ceramic filler is of HCP structure and includes 70-95% by weight of the PTC material layer. The trip jump value of the over-current protection device after 300 times trip is less than or equal to 25. The resistance repeatability of the device can be effectively improved by adding the conductive ceramic filler.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

A thermistor includes a resistive device, a first insulation layer, a first electrode, a second electrode and a first heat-conductive layer. The resistive device includes a first electrically conductive member, a second electrically conductive member and a polymeric material layer laminated therebetween. The polymeric material layer exhibits positive temperature coefficient (PTC) or negative temperature coefficient (NTC) behavior. The first insulation layer is disposed on the first electrically conductive member. The first electrode is electrically coupled to the first electrically conductive member, whereas the second electrode is electrically coupled to the second electrically conductive member and is insulated from the first electrode. The first heat-conductive layer is disposed on the first insulation layer, and has a heat conductivity of at least 30 W/m-K and a thickness of 15-250 μm.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

A surface mountable thermistor comprises a resistive device, first and second electrodes, and at least one heat conductive dielectric layer. The resistive device contains first and second electrically conductive members and a polymeric material layer laminated therebetween. The polymeric material layer exhibits PTC or NTC behavior. The polymeric material layer and the first and second electrically conductive members commonly extend in a first direction. The first electrode is electrically coupled to the first electrically conductive member. The second electrode is electrically coupled to the second electrically conductive member and is insulated from the first electrode. The heat conductivity of the first electrode or the second electrode is at least 50 W/mK. The heat conductive dielectric layer comprises polymeric insulation matrix and heat conductive filler, and is disposed between the first electrode and the second electrode. The heat conductivity of heat conductive dielectric layer is between 1.2 W/mK-13 W/mK.

IPC Classes  ?

• H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material

Abstract

An over-current protection device includes a resistive device, an insulation layer, an electrode layer and at least one electrically conductive connecting member. The resistive device includes a first electrode foil, a second electrode foil and a positive temperature coefficient (PTC) material layer laminated between the electrode foils. The insulation layer is formed on the surface of the first electrode foil, and the electrode layer is formed on the surface of the insulation layer. The conductive connecting member penetrates the electrode layer, the insulation layer and the first electrode foil for electrically connecting the electrode layer and the first electrode foil. The conductive connecting member is insulated from the second electrode foil. One of the first and second electrode foils is configured to electrically connect to a protective circuit module (PCM), and the other one is configured to electrically connect to an electrode terminal of a battery to be protected.

IPC Classes  ?

• H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature

Abstract

An over-current protection device comprises a PTC material layer, first and second conductive layers, first and second electrodes, and four conductive vias. The first and second conductive layers are in physical contact with first and second surfaces of the PTC material layer, respectively. The first electrode contains a pair of first metal foils, and the second electrode contains a pair of second metal foils. The four conductive vias are formed at the corners each defined by two adjacent planar lateral surfaces. Two conductive vias connect the pair of the first metal foils and the first conductive layer, and the other two conductive vias connect the pair of the second metal foils and the second conductive layer. The ratio of the sum of the cross-sectional areas of the conductive vias to a form factor area of the device is in the range of 7% to 20%.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

2.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

An over-current protection device includes two metal foils and a PTC material layer laminated therebetween. The PTC material layer has a volume resistivity between 0.07 Ω-cm and 0.32 Ω-cm. The PTC material layer includes a crystalline polymer, a conductive ceramic carbide filler of a particle size between 0.1 μm and 50 μm and a volume resistivity less than 0.1 Ω-cm, and a carbon black filler. The weight ratio of the carbon black filler to the conductive ceramic carbide filler is between 1:90 and 1:4. The conductive ceramic carbide filler and the carbon black filler are dispersed in the crystalline polymer. The resistance ratio R100/Ri is between 3 and 20.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

An over-current protection device includes a conductive composite having a first crystalline fluorinated polymer, a plurality of particulates, a conductive filler, and a non-conductive filler, wherein the plurality of particulates include a second crystalline fluorinated polymer. The first crystalline fluorinated polymer has a crystalline melting temperature of between 150 and 190 degrees Celsius. The plurality of particulates including the second crystalline fluorinated polymer are disposed in the conductive composite, having a crystalline melting temperature of between 320 and 390 degrees Celsius and having a particulate diameter of from 1 to 50 micrometers. The conductive filler and the non-conductive filler are dispersed in the conductive composite.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

2.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

A variable impedance composition according to one aspect of the present invention comprises a high electro-magnetic permeability powder in an amount from 10% to 85% of the weight of the variable impedance composition, and an insulation adhesive in an amount from 10% to 30% of the weight of the variable impedance composition. The incorporation of high electro-magnetic permeability powder including carbonyl metal, such as carbonyl iron or carbonyl nickel, in the variable impedance composition can not only suppress the overstress voltage, but also dampen the transient current. In contrast to the conventional electrostatic discharge (ESD) device, the relatively high electro-magnetic permeability carbonyl metal powder can reduce arcing as well as lower the trigger voltage of the device. The high electro-magnetic permeability characteristics can also absorb the undesirable electro-magnetic radiation that causes corruption of signal and loss of data.

IPC Classes  ?

• H01B 1/14 - Conductive material dispersed in non-conductive inorganic material
• H01B 1/20 - Conductive material dispersed in non-conductive organic material

Abstract

The over-current protection device of the present invention can be used for over-current protection to PCM. The over-current protection device comprises a PTC device, at least one insulation layer; at least one electrode layer and at least one conductive channel. The insulation layer is placed on a surface of the PTC device, and the electrode layer is formed on the insulation layer afterwards. As a result, the insulation layer is between the electrode layer and the PTC device. The electrode layer serves as a surface of the over-current protection device. The conductive channel electrically connects the PTC device and the electrode layer. In an embodiment, the conductive channel is a blind hole penetrating through the electrode layer and the insulation layer and ending at the surface of the PTC device, and the surface of the blind hole is coated with a conductive layer to electrically connect the PTC device and the electrode layer.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

An over-current and over-voltage protection assembly apparatus including an over-current protection (OCP) device and an over-voltage protection (OVP) device is provided. One end of the OCP device is electrically connected to a first connection point, and the other end is electrically connected to a second connection point. One end of the OVP device is electrically connected to a third connection point, and the other end is electrically connected to the second connection point. The second connection point is a common point. The OCP device and the OVP device are modularized and integrated to an assembly. The first, second, and third connection points are connected to an external circuit to be protected, such that the OCP device is connected in series to the circuit to be protected, and the OVP device is connected in parallel to the circuit to be protected.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection

Abstract

A high voltage over-current protection device includes a positive temperature coefficient (PTC) electrically conductive heat-dissipation layer and two metal electrodes. The PTC electrically conductive heat-dissipation layer includes at least one polymer, an electrically conductive filler, and a heat conductive filler. Due to the high thermal conductivity of the heat conductive filler (with a coefficient of thermal conductivity higher than 1 W/mK), the high voltage over-current protection device has a high thermal conduction characteristic, and the withstand voltage thereof can be substantially uniformly distributed in the PTC electrically conductive heat-dissipation layer to enhance its high voltage withstanding characteristic.

IPC Classes  ?

• H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

2.

IPC Classes  ?

• H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

An over-current protection device comprises two metal foils and a PTC material layer laminated between the two metal foils. The PTC material layer essentially comprises a polymer matrix and a conductive filler. The polymer matrix at least comprises a first crystalline polymer, e.g., LDPE, and a second crystalline polymer, e.g., PVDF, in which the melting temperature of the second crystalline polymer subtracting the melting temperature of the first crystalline polymer is equal to or more than 50° C. The conductive filler is selected from metallic grain of a volumetric resistivity less than 500 μΩ-cm, and is distributed in the polymer matrix. The initial volumetric resistivity of the PTC material layer is less than 0.1Ω-cm, and the trip temperature of the PTC material layer at which the resistance thereof increases to 1000 times the initial resistance subtracting the melting temperature of the first crystalline polymer is less than 15° C.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Abstract

2.

IPC Classes  ?

• H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive

Abstract

2. The over-current protection device exhibits a surface temperature below 100° C. under the trip state of over-current protection.

IPC Classes  ?

• H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Goods & Services

VARIABLE RESISTORS, NAMELY, POLYMER POSITIVE COEFFICIENT RESISTORS

Goods & Services

Variable resistors, namely, polymer positive coefficient resistors

Goods & Services

Variable resistor, Polymer positive coefficient resistor