Molded Case Circuit Breaker (MCCB)


Molded Case Circuit Breaker (MCCB) isĀ a circuit breaker which is assembled as an integral unit in a supportive and enclosed housing of insulating material, generally 20 to 3000 A in size and used in systems up to 600 Vac and 500 Vdc. The function is to open a circuit during an overcurrent event, thus protecting the cabling and devices connected to it.