The Siemens 5SU1354-1KV10 is a combined residual-current device (RCD) and miniature circuit breaker (MCB) — an FI/LS protector — in a single 1+N-pole unit. It integrates Type AC residual-current detection at 30 mA sensitivity with a C-curve overcurrent trip at 10 A, all rated for a 10 kA breaking capacity.
Deployment context
The 70 mm depth (D=70 mm per the description) fits standard DIN-rail enclosures. As a 1+N-pole unit it occupies one module width on the rail, switching the line conductor only while the neutral is switched internally for isolation. This form factor is typical for final-distribution boards in residential, commercial, and light-industrial panels where combined RCD/MCB protection is required in a single module.
