5SU1356-0KK40 SIEMENS

The 5SU1356-0KK40 is a Residual Current Circuit Breaker with Overcurrent protection (RCBO) from Siemens, designed to provide comprehensive protection against both overload/short circuit and residual current faults. This RCBO offers a breaking capacity of 6kA, suitable for standard residential and commercial applications. It features a 1P+N (one pole plus neutral) configuration, ensuring both live and neutral conductors are protected. The device is a Type AC RCBO, which detects sinusoidal alternating residual currents. With a sensitivity of 30mA, it quickly disconnects the circuit in the event of a ground fault, minimizing the risk of electric shock. Its B characteristic tripping curve makes it ideal for circuits with resistive or slightly inductive loads. The RCBO is rated for a nominal current (In) of 40A and an AC voltage (Un AC) of 230V, making it compatible with standard European power supplies. This device combines the functionality of a circuit breaker and a residual current device in a single, compact unit, saving space in the distribution board and simplifying installation. It enhances electrical safety by protecting against both overcurrents and earth leakage currents.