FuseBox 40A B Curve 10kA Triple Pole MCB | MT10B403

The FuseBox MT10B403 is a 40A B curve 3P miniature circuit breaker with a 10kA breaking capacity, protecting a single multi pole circuit against overload and short circuit.

As a triple pole device it disconnects all three poles together, making it suited to three phase motors, heaters and sub main feeds. The B curve characteristic trips magnetically between 3 and 5 times rated current, the usual choice for domestic final circuits with resistive and general loads. Final device selection should always follow the circuit design, cable size, installation method and fault level of the installation.

Key features

• 40A rated current
• B Curve tripping characteristic
• 10kA short circuit breaking capacity
• Triple Pole (3P) protection
• 35mm DIN rail mounting
• Fits FuseBox consumer units and TPN distribution boards

• Brand: FuseBox
• Product code: MT10B403
• Product type: Miniature circuit breaker (MCB)
• Rated current: 40A
• Tripping characteristic: B Curve
• Breaking capacity: 10kA
• Poles: 3P
• Width: 3 module
• Mounting: 35mm DIN rail
• Standard: BS EN 60898

Suitable for

Commercial and industrial distribution boards, FuseBox TPN boards and installations with higher prospective fault currents. Typical 40A use: cookers, electric showers and EV charger supplies.