What this part is and what it does
The Siemens 5SU1354-1LV16 is a combined residual-current device and miniature circuit breaker (RCBO) — a single module that handles both earth-leakage and overcurrent protection in one DIN-rail package. Type AC means it detects sinusoidal AC residual currents only; the 30 mA trip threshold is the standard for personal protection against direct contact. The 10 kA breaking capacity at the rated voltage covers most commercial and light-industrial sub-distribution panels where the prospective short-circuit current stays below that level. The C 16 A characteristic is sized for moderate inrush loads — lighting banks, small motor circuits, or socket-outlet groups — where a B curve would nuisance-trip on starting current.
What the ratings mean for fit
The 30 mA residual sensitivity (IΔn) meets the IEC 60364 requirement for socket-outlet circuits in residential and commercial installations — it clears a fault before ventricular fibrillation becomes likely. The 10 kA rated short-circuit capacity (Icn) per EN 61009-1 is the standard for final sub-circuits fed from a distribution board with a transformer rating up to about 630 kVA. The C 16 A overcurrent characteristic holds a magnetic release at 5–10× In (80–160 A), so it tolerates the starting surge of a 4 kW motor or a row of fluorescent luminaires without nuisance tripping. The 1+N-pole configuration switches the line and disconnects the neutral; the G-type (WS) designation indicates a wider terminal spacing for panel wiring.