5SU1654-7KK20 SIEMENS

The 5SU1654-7KK20 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 is a 1P+N (one pole plus neutral) device, suitable for single-phase applications. It has a breaking capacity of 10kA, indicating its ability to safely interrupt high fault currents. 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 300mA, it provides a good balance between protection against electrical shock and nuisance tripping. The C-characteristic tripping curve indicates that it is designed for circuits with moderate inrush currents, such as lighting and general-purpose circuits. It has a rated current (In) of 20A and a rated voltage (Un) of 230V AC. This RCBO combines the functions of a miniature circuit breaker (MCB) and a residual current device (RCD) in a single compact unit, saving space in the distribution board and simplifying installation. It is suitable for use in residential, commercial, and industrial applications to protect people and equipment from electrical hazards.