What is the difference between MCB and MCCB?

MCB (Miniature Circuit Breaker) is used for lower current ratings typically up to 125A with fixed trip settings, suitable for residential and light commercial applications. MCCB (Molded Case Circuit Breaker) handles higher currents from 100A to 2500A with adjustable trip settings, offering higher interrupting capacity for industrial applications. MCCBs are larger, more expensive, but provide more precise protection and can include electronic trip units.