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 10 kA breaking capacity covers the majority of domestic and light commercial distribution boards where the prospective short-circuit current stays under that threshold.
What the ratings mean for fit
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. The C‑curve (13 A) provides magnetic trip between 5 and 10 times In, so it handles motor inrush and capacitive loads without nuisance tripping, while still clearing short circuits. The 10 kA breaking capacity at the rated voltage means the device can safely interrupt a fault up to that level without upstream backup, provided the prospective short-circuit current at its installation point does not exceed 10 kA.
Deployment context
The 70 mm wide housing snaps onto standard DIN rail in a distribution board or sub-distribution panel. 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.