5SU1656-7KK20 SIEMENS

The 5SU1656-7KK20 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 features a 1P+N (one pole plus neutral) configuration, making it suitable for single-phase applications. It has a breaking capacity of 6 kA, indicating its ability to safely interrupt fault currents up to 6000 Amperes. The device is a type A RCBO, meaning it is sensitive to both AC and pulsating DC residual currents. With a residual current tripping sensitivity of 300 mA, it offers a balance between protection against leakage currents and minimizing nuisance tripping. The C-characteristic tripping curve indicates its suitability for circuits with moderate inrush currents, such as lighting and general-purpose circuits. It is rated for a nominal current (In) of 20 A and an AC voltage (Un AC) of 230 V. This RCBO combines the functions of a circuit breaker and a residual current device in a single compact unit, saving space in electrical panels and simplifying installation. It is commonly used in residential, commercial, and industrial applications to protect people and equipment from electrical hazards.