![]() The MCB has two contacts, where one is movable and the other one is fixed. ![]() Its fundamental function is to interrupt the current flow once a fault is detected. What is a Miniature Circuit Breaker (MCB)?Īn MCB, or a miniature circuit breaker, is an automated electrical device intended to protect an electrical circuit from damage caused by excess current, usually occurring from an overload or short circuit. The MCB stands for “Miniature Circuit Breaker”, while the MCCB for “Molded Case Circuit Breaker.” Before moving on to know the key differences, get acquainted with the fundamentals of MCB and MCCB. ![]() First of all, let’s understand what the abbreviations MCB and MCCB stand for. Even though both MCB and MCCB are circuit breakers, there are some specific differences which make them apt for particular use. ![]() But as a layman, we could hardly differentiate between them. Most of us have heard the terms “MCB” and “MCCB” at some point of time. ![]()
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