PTC device

Details PTC device PTC device

1991-04-23

1993-09-21

Lateef, Marvin M.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 22SD, H01C 710

Patent

active

052472760

ABSTRACT:
A self-recovery PTC device for overcurrent protection of electrical circuits is made with a polymer/metal powder composition electrode that displays stable resistivity over a broad range of contact forces. Secure bonding of electrodes to a PTC element is achieved because both components are polymer composites, eliminating the problems associated with attempts to bond metal electrodes to a polymer PTC element. Swelling of metal electrodes, that results from outgassing by a PTC element, is also eliminated, because polymer electrodes are gas permeable.

REFERENCES:
patent: 3432355 (1969-03-01), Niedrach et al.
patent: 4053864 (1977-10-01), Rodriguez et al.
patent: 4241289 (1980-12-01), Bowling

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