A 125A 2-Pole Molded Case Circuit Breaker (MCCB) is a heavy-duty electrical protective device designed to automatically interrupt current flow to prevent electrical fires and equipment damage caused by overloads or short circuits.
Unlike standard miniature circuit breakers (MCBs) found in home breaker boxes, an MCCB features a rugged, molded insulating housing built to withstand significantly higher electrical fault currents and demanding commercial or industrial environments