The Wylex NXSB40AFD Single Module Arc Fault Device in white is a Type B tripping characteristic circuit breaker with a maximum amperage of 40A. It is suitable for automotive applications and can be mounted on a DIN rail with 2 positions. Made from ABS/plastic and plastic materials, this device offers reliable protection against arc faults in a single-phase system with a voltage range of 201-250V. With a brand name of Wylex and a current rating of 31-40A, this compact and efficient circuit breaker is ideal for use in various rooms.