ATC Semitec FC-P2D Series Thermal Protectors – ATC Semitec PFCP1000504XX, These snap-action thermal protectors are designed to provide a cost effective solution in a range of motor, transformer and lighting applications such as: battery packs, lighting fixtures, electronic circuits, heaters and automotive. The conductive bimetal construction where the bimetal carries the circuit current ensures maximum sensitivity under short circuit conditions. ATC Semitec PFCP1000504XX Fc-p2d Series Thermal Cut Out 100 °c