Answer Posted / balakrishnan

MCB is normally used for small loads like in DBs, MCB can
only protect loads from over current, it is available upto
100A.
MCCB is having some special characteristics over MCB. It
protects loads from over current, short circuit current and
earth fault protection. Moreover it is available in all
ranges (16A to 3200A).
MCBs are used mostly in DBs, MCCBs are used for all SMDBs
and MDBs.

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