Single-Pole MCBs for Domestic & Commercial Circuit Protection
Single-pole MCBs provide overcurrent and short-circuit protection for individual live conductors on single-phase circuits. They are the standard protective device used in most UK consumer units and distribution boards, covering lighting, socket outlets, small power circuits and a wide range of fixed appliances.
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These breakers interrupt the line conductor only, ensuring rapid fault clearance while keeping the neutral intact. They are available across a full range of current ratings and tripping curves, making them suitable for both domestic and light-commercial installations with predictable load characteristics.
- Single-pole protection for standard single-phase circuits
- Wide rating range for lighting, sockets and appliance feeds
- B and C curves for different inrush profiles
- 6kA and 10kA options to match site fault-level calculations
- Compact DIN-rail modules for easy installation and replacements
Single-pole MCBs are used in the majority of consumer units and are the correct protective device whenever only the line conductor requires disconnection under fault conditions.
6kA MCB – 6A 1 Pole B Curve (WMC106B)
£1.84
£2.99
The WMC106B is a 6A single-pole 6kA Miniature Circuit Breaker (MCB) designed to provide reliable overcurrent and short-circuit protection on domestic and light-commercial lighting circuits. Rated for 230/400 V AC operation, it features a B-curve tripping characteristic that reacts at 3–5 × rated current -...
1 Pole 10kA MCB 6A B Curve WKC106B
£5.00
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 applications, they provide reliable protection for domestic, commercial, and industrial distribution systems – including solar PV with SPD and EV charging...
6kA MCB – 32A 1 Pole B Curve (WMC132B)
£1.84
£2.99
The WMC132B is a 32 A single-pole 6 kA Miniature Circuit Breaker (MCB) engineered for high-load domestic and light-commercial circuits such as cookers, immersion heaters, and fixed plant. It features a B-curve tripping characteristic that operates at 3–5 × rated current to deliver precise overcurrent...
1 Pole 10kA MCB 16A C Curve WKC116C
£5.00
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 applications, they provide reliable protection for domestic, commercial, and industrial distribution systems – including solar PV with SPD and EV charging...
6kA MCB – 6A 1 Pole C Curve (WMC106C)
£2.00
£3.40
The WMC106C is a 6 A single-pole 6 kA Miniature Circuit Breaker (MCB) providing dependable overcurrent and short-circuit protection for lighting and auxiliary circuits with higher inrush current such as LED drivers, transformers and control gear. Its C-curve tripping characteristic (5–10 × In) offers greater...
What Is a Single-Pole MCB?
A single-pole MCB is a miniature circuit breaker that disconnects only the live conductor when a fault occurs. This ensures safe isolation of the circuit under overcurrent or short-circuit conditions while leaving the neutral conductor unaffected.
Where Single-Pole MCBs Are Used
- Lighting circuits in domestic and commercial settings
- Ring circuits and radials supplying socket outlets
- General fixed appliances such as boilers and immersion heaters
- Workshops and small commercial boards with predictable load behaviour
- Distribution boards where only line isolation is required
Benefits of Single-Pole Protection
Single-pole breakers provide fast fault clearance on the live conductor, supporting safe operation and predictable disconnection times on standard single-phase installations. They remain the industry standard for domestic and small-scale commercial work.
- Simpler installation than double-pole alternatives
- Lower cost while maintaining full overcurrent protection
- Compact design maximises usable ways in consumer units
B Curve vs C Curve Single-Pole MCBs
B Curve: Trips at 3–5 × rated current; ideal for lighting and general circuits.
C Curve: Trips at 5–10 × rated current; suitable for circuits with moderate inrush, such as small motors or equipment with start-up surge.
Compliance & Standards
All Single-Pole MCBs in this category meet BS EN 60898 and comply with 18th Edition Wiring Regulations when correctly selected based on fault level, circuit design and load characteristics.
Installer Benefits
Reliable, predictable and widely compatible, single-pole MCBs provide everyday protection across the vast majority of UK circuits. Their modular design, familiar operation and broad rating selection make them a dependable choice for upgrades, rewires and new installations.