Difference between MCB and MCCB

Difference between MCB and MCCB

MCBs are miniature circuit breakers with optimum protection facilities of overcurrent only.These are manufactured for fault level of up to 10KA only with operating current range of 0.5 to 63 Amps (the ranges are fixed), single,double and three pole verson.These are used for smaller loads -electronic circuits,house wiring etc.


MCCBs are Moulded case Circuit breakers,with protection facilities of overcurrent, earth fault. it has a variable range of 50% to 100% operating current.They can be wired for remote as well as local operation both.They are manufactured for fault levels of 16KA to 50KA and operating current range of 25A to 630Amps.They are used for aplication related with larger power flow requirement.


The main difference between MCB and MCCB is the current ratings.

MCB – Used for Applications which requires less than 100A.

MCCB – Used for Applications which requires less than 1000A.


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