MCB vs MCCB vs ACB: What Is the Difference?

MCB, MCCB and ACB are all circuit breakers, but they are built for very different current ranges and applications.

MCB — Miniature Circuit Breaker

Used for low-current circuits (up to ~125A) in homes and small commercial setups. Compact and DIN-rail mounted.

MCCB — Moulded Case Circuit Breaker

Handles higher currents (up to ~1600A) with adjustable trip settings. Ideal for sub-distribution and motor protection in industry.

ACB — Air Circuit Breaker

Built for very high currents (up to 6300A) at the main incomer of large installations, with advanced protection and metering.

Quick comparison

Type	Typical Range	Where
MCB	Up to 125A	Homes, shops
MCCB	Up to 1600A	Sub-distribution, motors
ACB	Up to 6300A	Main incomer, industry

We stock all three from leading brands. Browse our range.