MCD has various meanings in the Technology category. Discover the full forms, definitions, and usage contexts of MCD in Technology.
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Miniature Circuit Breaker
A device designed to perform the same function as a fuse but resettable. When the circuit breaker activates, or trips out, it disconnects the circuit. The fault condition must be found and rectified before the MCB can be reset. Usually for ratings less than 63 A.