The Siemens 5SU1356-0KV10 is a Type AC residual current circuit breaker with overcurrent protection (RCBO) — a 1+N-pole unit rated B-curve 10 A with a 30 mA earth-leakage trip threshold and 6 kA breaking capacity. The 70 mm width fits standard Siemens distribution board slots. Type AC means it detects sinusoidal AC residual currents only, which covers the majority of general-purpose socket and lighting circuits in residential and light commercial panels.
What the ratings mean for fit
The B-curve 10 A trips magnetically between 3× and 5× rated current (30–50 A), suited for resistive and moderate inductive loads like lighting, socket outlets, and small appliances. The 30 mA residual sensitivity meets the standard earth-leakage protection threshold for personnel protection in most IEC 60364 installations. 6 kA breaking capacity (Icn) covers typical domestic and light commercial short-circuit levels; if the prospective fault current at the installation point exceeds 6 kA, an upstream backup fuse or MCB with higher Icn is needed.