Type C MCBs (C Curve Circuit Breakers)
Type C MCBs (also known as C curve circuit breakers) are designed for circuits with moderate to high inrush currents. They provide reliable overcurrent and short-circuit protection while allowing equipment such as motors, compressors and HVAC systems to start without nuisance tripping.
Available in multiple current ratings and breaking capacities, our C curve MCBs are suitable for domestic, commercial and light industrial distribution boards.
Quick overview: A Type C MCB trips between 5–10 times its rated current, making it the correct choice for motor-driven or inductive loads where startup surge is higher than standard lighting circuits.
Read more about C curve characteristics
- Type C tripping curve (5–10 × In)
- Ideal for motor and compressor circuits
- 6kA and 10kA breaking capacities
- DIN-rail compatible single-module designs
- Compliant with BS EN 60898
Choosing the correct MCB curve type ensures stable operation during equipment startup while maintaining rapid fault clearance.
6kA MCB – 32A 1 Pole C Curve (WMC132C)
£1.84
£2.99
The WMC132C is a 32 A single-pole 6 kA Miniature Circuit Breaker (MCB) built for high-load circuits with moderate to high inrush current - including cookers, workshop sockets and small machinery. Its C-curve tripping profile (5–10 × In) provides extra immunity to motor and transformer...
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 – 25A 1 Pole C Curve (WMC125C)
£1.84
£2.99
The WMC125C is a 25 A single-pole 6 kA Miniature Circuit Breaker (MCB) designed for radial and equipment circuits subject to moderate inrush currents such as motors, compressors or EV chargers. Its C-curve tripping characteristic (5–10 × In) offers greater surge tolerance while providing rapid...
WKC 3 Pole 10kA MCB – 20A C Curve (WKC320C)
£21.30
The WKC320C 3 Pole 10kA MCB is a 20A C Curve breaker built to safeguard three-phase circuits against overload and short-circuit faults. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it’s ideal for circuits with moderate inrush currents such as...
4 Pole MCB 10kA C Curve 100A WKC4100C
£30.67
The WCED WKC4100C is a 4 Pole 100A MCB with a C curve tripping characteristic and a 10kA breaking capacity. Designed for high-demand installations, it provides reliable protection against overloads and short-circuits while also serving as an isolator when required. Commonly used in EV charging...
What Is a Type C MCB?
A Type C MCB is a miniature circuit breaker that trips at 5–10 times its rated current. This higher tolerance allows circuits with moderate inrush currents to operate correctly while still protecting against overload and short-circuit faults.
Common Applications
- Motor-driven equipment
- Heat pumps and HVAC systems
- Compressors and pumps
- Workshop machinery and power tools
- Commercial distribution boards
B Curve vs Type C MCB
B Curve: Trips at 3–5 × rated current. Suitable for lighting and general domestic circuits.
Type C: Trips at 5–10 × rated current. Recommended for circuits with higher startup loads.
Available Ratings & Breaking Capacities
We supply Type C MCBs in multiple amp ratings, including 6kA and 10kA variants to match fault level requirements in domestic and commercial installations.
Compliance & Standards
All C curve circuit breakers meet BS EN 60898 requirements and are suitable for use in 18th Edition compliant installations.