Patent ID: 8299888

Claim:
A PTC device, comprising (A) a polymer PTC component comprising: (a1) an electrically conductive filler, and (a2) a polymer material; the polymer PTC component being defined by opposite main surfaces and a side surface connecting outer peripheries of these main surfaces, and (B) layered metal electrodes placed on the main surfaces on both sides of the polymer PTC component, the PTC device having a support member extending outward from a periphery of at least one of the main surfaces, and the side surface of the polymer PTC component being sealed from an ambient environment around the PTC device by a cured curable resin disposed and supported on the support member, at least one of the layered metal electrodes having only a first part positioned on the main surface of polymer PTC component, and a peripheral part of the first part having a plastic film member on it or above it, the plastic film member comprising an inner portion positioned on or above the peripheral part of the layered metal electrode and a rim-like portion extending outward from an outer periphery of the inner portion, and the rim-like portion of the plastic film member functioning as the support member.