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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.
Quick answer: An MCB is a resettable circuit breaker that protects wiring and connected equipment from overload and short circuit faults. The right MCB depends on the circuit rating, fault level, and whether you need a B curve, C curve, or more specialist trip characteristic.
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.
Need earth leakage protection as well? Browse our RCBO range. For delivery and returns, see our delivery information and returns policy.
The WCED WKC Series 10kA Miniature Circuit Breakers (MCBs) are high-performance devices designed for precise overcurrent detection and short-circuit protection. Built to handle demanding...
The WCED WKC Series 10kA Miniature Circuit Breakers (MCBs) are high-performance devices designed for precise overcurrent detection and short-circuit protection. Built to handle demanding...
The WCED WKC Series 10kA Miniature Circuit Breakers (MCBs) are high-performance devices designed for precise overcurrent detection and short-circuit protection. Built to handle demanding...
The WCED WKC Series 10kA Miniature Circuit Breakers (MCBs) are high-performance devices designed for precise overcurrent detection and short-circuit protection. Built to handle demanding...
The WCED WKC Series 10kA Miniature Circuit Breakers (MCBs) are high-performance devices designed for precise overcurrent detection and short-circuit protection. Built to handle demanding...
The WMC140C is a 40 A single-pole 6 kA Miniature Circuit Breaker (MCB) designed for sub-mains, plant feeds and high-load circuits where inrush currents...
The WMC163C is a 63 A single-pole 6 kA Miniature Circuit Breaker (MCB) designed for large feed and distribution circuits where inrush currents from...
The WMC163B is a 63 A single-pole 6 kA Miniature Circuit Breaker (MCB) built for high-load distribution circuits, feed boards and plant equipment. It...
The WMC150B is a 50 A single-pole 6 kA Miniature Circuit Breaker (MCB) providing dependable overcurrent and short-circuit protection for heavy-duty feed circuits and...
The WMC140B is a 40 A single-pole 6 kA Miniature Circuit Breaker (MCB) built for high-load domestic and light-commercial circuits such as sub-mains, electric...
The WKC240C is a 40 A 2 Pole 10 kA Miniature Circuit Breaker (MCB) providing robust short-circuit and overload protection for moderate inrush applications....
The WKC232C is a 32 A 2 Pole 10 kA Miniature Circuit Breaker (MCB) designed for reliable short-circuit and overload protection on circuits with...
Select an MCB from the circuit design—not by amp rating alone. The device must coordinate with the conductor, connected load, prospective fault current and upstream protection. Confirm the required trip curve, pole format and breaking capacity before ordering.
Commonly used where normal inrush current is relatively low, including many lighting, socket and general-purpose circuits. Suitability still depends on the design calculations.
Allow a higher instantaneous trip threshold than B curve devices and are often considered for loads with greater starting current, subject to the required disconnection times.
Choose single-, two-, three- or four-pole formats for the supply and isolation requirement, then verify whether a 6kA, 10kA or other rated breaking capacity is needed.
Circuit Protection6kA MCBs10kA MCBsRCBOsThree Phase
Trade support: UK-stocked products, manufacturer-backed specifications and fast dispatch. Check each product page for ratings, standards, stock status and delivery details before ordering.
$132.00 ex VAT
VAT: Product prices exclude VAT. VAT is added at checkout.
