BG Fortress CUMB40 40A 6kA Single Pole Type B MCB

£2.50 £3.00 Inc VAT

Technical Specifications

Attribute Detail
Manufacturer BG Electrical
Range Fortress
Product Code CUMB40
Amperage 40A
Breaking Capacity 6kA
Tripping Curve B-Curve
Number of Poles 1 Pole (Single Pole)
Voltage 230V AC
Standard BS EN 60898-1

40 in stock

Estimated Standard Delivery May 27, 2026 - May 28, 2026

Description

The BG Fortress CUMB40 is a high-capacity 40 Amp Miniature Circuit Breaker designed for heavy-duty domestic and light commercial applications. It is the standard choice for circuits requiring significant power delivery, such as large electric showers, smaller EV chargers, or dedicated sub-main feeds.

Engineered to fit the high-performance BG Fortress range, this 40A B-Curve MCB provides essential protection against overloads and short circuits while maintaining the slim profile of the Fortress series.

Key Features & Benefits

  • High Amperage Rating: 40A capacity, specifically suited for high-wattage appliances and dedicated power runs.

  • Type B Tripping: Designed for domestic sensitivity, tripping at 3 to 5 times the rated current to protect against faults without nuisance tripping.

  • Robust Safety: 6kA short-circuit breaking capacity ensures the breaker can handle significant fault currents safely.

  • Red/Green Status Indicator: Built-in positive contact indicator gives an immediate visual confirmation of the circuit status.

  • Reliable Terminals: Features captive, combi-head terminal screws to ensure a secure, high-torque connection every time.