Siemens 5SU1356-7KV16 FI/LS-Protector Type A, 30mA, 6kA, C16

The Siemens 5SU1356-7KV16 is a combined residual-current and miniature circuit breaker (RCBO) — an FI/LS-protector Type A in the PSE/SSF form factor. It packs a 30 mA residual-current trip and a C-curve 16 A overcurrent characteristic into a single 1+N-pole module that's 70 mm deep. That 6 kA breaking capacity is good for most domestic and light commercial sub-distribution boards where the prospective fault current stays under that threshold. The Type A sensitivity means it catches pulsating DC fault currents — think modern electronics, LED drivers, and single-phase rectifier loads — not just pure AC sine-wave leakage.