The Wylex SP+SN Miniature Type B Module (NHXS1B40) is a white Residual Current Circuit Breaker Operating (RCBO) designed for wall mounting. With a maximum amperage of 40A and a current rating of 31-40A, this 1-phase module is suitable for interior use. Featuring a DIN rail mounting style and an on/off operation method, this ABS/plastic module offers instantaneous break time for safety. With a voltage range of 201-250V, this Wylex RCBO is a reliable choice for circuit protection.