MCBs – Miniature Circuit Breakers for Domestic & Commercial Circuits

MCBs (miniature circuit breakers) protect electrical circuits against overload and short circuit faults. They are used in consumer units, distribution boards, and three-phase installations to disconnect power automatically when current rises beyond a safe level.

This collection includes Type B MCBs for standard circuits, Type C MCBs for circuits with higher inrush current, and selected specialist options for more demanding applications. Whether you’re replacing a single breaker or specifying a full board, this is the main hub for our MCB range.

MCBs are one of the most common circuit protection devices used in UK electrical installations. They are fitted across consumer units, three-phase boards, and enclosure-based builds to provide fast disconnection under fault conditions while remaining easy to reset once the issue is resolved.

• Type B MCBs – commonly used on standard domestic circuits such as lighting and sockets
• Type C MCBs – suited to circuits with higher start-up or inrush current
• Selected D curve options – for more specialist high-inrush applications
• Multiple ratings and pole formats – for domestic, commercial, and three-phase use
• 6kA and 10kA options – depending on installation requirements

Need earth leakage protection as well? Browse our RCBO range. For delivery and returns, see our delivery information and returns policy.