Type C MCBs

Type C MCBs, also called C curve circuit breakers or Type C breakers, are used on circuits with higher start-up current than standard domestic loads. They provide overload and short-circuit protection while allowing motor-driven and inductive equipment to start without unnecessary tripping.

Common uses include compressors, pumps, HVAC equipment, heat pumps, workshop machinery, commercial distribution boards and circuits where a B curve MCB may trip too easily during normal start-up.

Choose the MCB curve based on the connected load, circuit design, fault level and manufacturer requirements. C curve devices are not a default upgrade from Type B; they should be selected where the inrush characteristics of the load justify the higher magnetic trip threshold.

• C curve tripping characteristic – typically 5–10 × rated current
• Higher inrush support – useful for motors, pumps, compressors and HVAC
• 6kA and 10kA options – choose based on prospective fault current and board requirements
• DIN rail mounting – suitable for compatible consumer units and distribution boards
• BS EN 60898 options – check individual product specification before ordering

For related protection, browse our B Curve MCBs, 10kA MCBs, RCBOs and circuit protection devices.