PN#1648-009-040-15 SKU#13129 Panel Mount Circuit Breaker, 40A. Bimetallic thermal sensing element anticipates overload conditions and interrupt the flow of current. Resettable actuator mechanism trips when senses overload, then remains disengaged until manually reset. Tightest performance curves available. UL 1500 ignition proof tested. Body material: UL rated 94 V-0 thermoset plastic housing. Single pole thermal type breakers. #10 Screw Mount Termination.