OVERVOLTAGE-OVERCURRENT PROTECTIVE DEVICE

Japanese Patent JP3853419

B

PROBLEM TO BE SOLVED: To break a circuit, and protect an apparatus by separating positive characteristic thermistors from each other by separating the positive characteristic thermistors in a layer shape when overvoltage and an overcurrent are applied to the positive characteristic thermistors.
SOLUTION: Electrodes 12 and 13 are formed on both surfaces of a positive characteristic thermistor element 1 by nickel plating and tin plating, and springy lead wires 2 and 3 are soldered to its electrodes by solder 4. Next, one electrode 13 of the positive characteristic thermistor element 1 and a base board 5 are adhered together by an adhesive 9, and the lead wire 2 is soldered to the base board 5 in a condition where the positive characteristic thermistor element is separably energized by spring force of the lead wires. When a prescribed electric current is flowed between these lead wires 3 and 2, a positive characteristic thermistor is self-heated, and separates in a layer shape by a temperature difference between the inside and a surface part of the positive characteristic thermistor, and the positive characteristic thermistors 1 and 1 separate from each other, and an electric current is broken.

WO/1998/011568	PTC THERMISTOR MATERIAL
JP04122001	PRODUCTION OF POSITIVE CHARACTERISTIC THERMISTOR
JP05074604	BAKING METHOD FOR POSITIVE TEMPERATURE COEFFICIENT THERMISTOR

Inoue, Kiyoshi

JP1996000113762

September 15, 2006

May 08, 1996

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NICHICON CORP

H01C7/02; H01H37/76; H05K1/02; H05K3/34; H01C7/02; H01H37/00; H05K1/02; H05K3/34; (IPC1-7): H01H37/76; //H01C7/02

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