Molded Case Circuit Breaker (MCCB)

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Molded Case Circuit Breaker (MCCB) is 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.