The Schneider Electric A9Z01240 residual current circuit breaker IDK is a two-pole circuit breaker with a rated current of 40 A and a residual current trigger with a sensitivity of 30 mA. It protects people from dangerous body currents by detecting fault currents and separating the faulty circuit. The residual current circuit breaker has a compact design and can be easily attached to a DIN rail. It complies with European standards and has CE certification and RoHS compliance. The Schneider Electric A9Z01240 residual current circuit breaker IDK is a type A circuit breaker that is also suitable for use in photovoltaic systems., Manufacturer: Schneider Electric