Ptc device

Details Ptc device Ptc device

H - Electricity

01

C

356/107

H01C 7/02 (2006.01) H01C 1/14 (2006.01)

Patent

CA 2040789

19 ABSTRACT OF THE DISCLOSURE 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 PI C element. Swelling of metal electrodes, that results from outgassing by a PTC element, is also eliminated, because polymer electrodes are gas permeable.

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