The Siemens 5SU1354-1KK32 is a SENTRON RCBO combining overcurrent and residual current protection in a single 2-module-width (36 mm) package. The type AC residual current detection covers sinusoidal AC fault currents — the standard choice for general-purpose final circuits in residential and commercial distribution boards. Breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2, giving selectivity headroom against upstream 25 kA or 36 kA MCCBs in a typical 230/240 V 50 Hz installation.
The 32 A rating applies at 30 °C ambient; at 40 °C the continuous current drops to 30.4 A, at 50 °C to 28.8 A, and at 70 °C to 24.64 A. IP20 applies once the distribution board is installed with connected conductors.