A switch that automatically shuts off current flow after protective relays detect an overload or a fault. Unlike fuses, circuit breakers can be reset multiple times without being replaced.Push too much current through electrical wires and they overheat; insulation melts; fires start. A circuit breaker senses the overcurrent and opens in milliseconds to prevent damage.Don't miss out on limited-time promotions and discounts for used circuit breakers – click here or visit our official hub.