5SU1653-7KK20 SIEMENS

The 5SU1653-7KK20 is a Residual Current Circuit Breaker with Overcurrent protection (RCBO) from Siemens, designed to provide comprehensive protection against both short circuits and residual currents. This RCBO features a 1P+N configuration, meaning it protects one phase and the neutral conductor, making it suitable for single-phase electrical systems. It has a breaking capacity of 4.5 kA, indicating its ability to safely interrupt fault currents up to 4500 Amperes. The device is a type A RCBO, which means it is sensitive to both AC and pulsating DC residual currents, offering enhanced protection against a wider range of fault conditions. With a residual current tripping sensitivity of 300 mA, it will trip and disconnect the circuit when a leakage current of 300 milliamperes or higher is detected, preventing electrical shocks and fire hazards. The RCBO has a C-characteristic tripping curve, making it suitable for circuits with moderate inrush currents, such as lighting and general-purpose circuits. It is rated for a nominal current (In) of 20 A, meaning it can continuously carry a current of 20 Amperes without tripping under normal operating conditions. The device is designed for a nominal AC voltage (Un AC) of 230 V, which is the standard voltage for many residential and commercial applications. This RCBO combines the functions of a circuit breaker and a residual current device in a single compact unit, saving space in the distribution board and simplifying installation.