The Siemens 5SU1354-1LV13 is a combined residual-current device and miniature circuit breaker (RCBO) — an FI/LS protector — in a single 1+N-pole module. It integrates Type AC residual-current detection at 30 mA with a C‑curve overcurrent trip rated at 13 A, all in a 70 mm wide housing.
The 30 mA residual-current sensitivity (Type AC) detects sinusoidal AC fault currents to earth — the standard requirement for socket-outlet circuits in most residential and commercial installations per IEC 60364.
Deployment context
The 1+N-pole format switches the line conductor and provides neutral switching, which is required in some national wiring rules for final circuits. Spring-cage or screw terminals accept 0.2–2.5 mm² conductors; strip length of 8 mm avoids whiskers under the clamp.