Circuit protection devices

Details Circuit protection devices Circuit protection devices

H - Electricity

01

C

317/12.9

H01C 7/02 (2006.01) H01C 7/13 (2006.01)

Patent

CA 1177528

ABSTRACT The invention relates to electrical devices which comprise two planar electrodes and a PTC conductive polymer element. According to the inven- tion, the conductive polymer element has an intermediate portion of increased resistance, resulting from the presence of one or more relatively non-conductive portions within the conductive polymer element, so that when a hot zone is formed in the PTC element, it is located at or near the intermediate-portion, away from the electrodes.

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