The Wylex NHX 40A B40 RCBO is a white, 1-pole, 1-phase circuit breaker with Type B tripping characteristics. It provides overload, short circuit, and overcurrent protection, making it suitable for interior use in commercial and electrical wiring applications. With a maximum amperage of 40A and operating at 230-400V AC, this DIN rail-mounted device features a switch control style and a compact design measuring 5 inches in height and 3 inches in width. Ideal for providing supplementary protection in electrical systems, this Wylex RCBO offers reliable performance and safety for a wide range of electrical setups.