5SU1353-7KK20 SIEMENS

The 5SU1353-7KK20 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 is a 1P+N device, meaning it has one protected pole and a neutral pole, suitable for single-phase applications. It features a breaking capacity of 4.5 kA, indicating its ability to safely interrupt fault currents up to 4.5 kiloamperes. 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 30 mA, it quickly disconnects the circuit in the event of a leakage current, preventing electric shock. 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 20 A, specifying the maximum continuous current it can carry without tripping. The rated voltage (Un) is 230 V AC, making it suitable for standard residential and commercial power systems. This RCBO combines the functions of a circuit breaker and a residual current device, saving space in the distribution board and simplifying installation. It ensures reliable protection of people and equipment against electrical hazards.