The Wylex 40 Amp Curve B MCB Circuit Breaker NHXB40 is a white, Type B tripping characteristic circuit breaker suitable for interior walls. With a voltage range of 201-250V and a maximum amperage of 40A, this DIN rail-mounted breaker features a switch control style and screw terminal electrical connection. Designed for any room, this supplementary protector has a break time of instantaneous and is ideal for electrical wiring applications. The Wylex NHXB40 is a reliable and efficient choice for protecting electrical circuits in residential or commercial settings.