BG Circuit Protection B Curve MCB 40A CUMB40

BG Circuit Protection B Curve MCB 40A provides reliable overload and short-circuit protection for domestic and light commercial electrical installations. This single-pole miniature circuit breaker features Type B characteristics, responding quickly to fault conditions whilst tolerating harmless inrush currents. Rated at 40A with a standard DIN rail mounting design, it integrates seamlessly into consumer units and distribution boards. Compliant with BS EN 60898-1 standards, the CUMB40 delivers consistent performance and safety across UK electrical systems. Ideal for protecting lighting circuits, small power loads, and general-purpose applications where dependable protection is essential.

Orders with standard delivery are dispatched within 3-7 working days. Standard delivery is free on orders over £100 and costs £6.75 for orders under this amount.

For quicker delivery, select our express shipping option at checkout for £8.95. With express shipping, we aim to deliver within 1-3 working days, although delivery times are ultimately managed by the courier once your order has shipped.

Some items may be stored in external warehouses. If so, we’ll notify you and arrange for delivery to our store or directly to you.

For complete details, visit our Delivery Information page (opens in a new tab).

Please review our Terms & Conditions before completing your purchase.

We strongly recommend arranging a qualified electrician to install any electrical items only after your order has been delivered. PU Electrical Wholesaler is not liable for any electrician fees incurred due to unexpected delivery delays.