Bussmann CB185-30 30 Type Iii Flush Mount Switchable/Manual High Amp Circuit Breaker, 30Vdc, One Per Box (1-Pack) CB185 Series, Type III, High Amp Circuit Breakers are typically used in auxiliary and accessory circuits for trucks, buses, RVs and marine applications Flush mount design with push-to-trip button that acts as a master disconnect for when you don't want the protected circuit powered 30 Amp, 42 Vdc; manual reset Sealed waterproof housing; 1/4-28 threaded studs; SEMS nuts installed 1 pack (box)