The Siemens 5SU1354-0LV13 is an FI/LS protector combining residual current detection and overcurrent protection in a single 1+N-pole unit. Its Type AC sensitivity (IΔn = 30 mA) and 10 kA breaking capacity make it suitable for final circuits in residential and commercial distribution boards where sinusoidal AC fault currents are expected.
What the Rating Means
The 10 kA rated short-circuit capacity (Icn) means this device can safely interrupt fault currents up to 10 kA without welding its contacts or failing catastrophically — a standard requirement for domestic and light commercial final circuits where the prospective short-circuit current at the board is typically under 6 kA. The 30 mA residual sensitivity protects against direct-contact shock hazard (hand-to-hand or hand-to-earth paths) per IEC 60364. The B 13 characteristic (13 A rated current, B-curve tripping) suits resistive and light inductive loads like lighting or socket circuits; it will hold inrush from a few fluorescent fittings but may nuisance-trip on a motor-starting load.
Panel Integration
The 70 mm depth (D=70MM) fits standard DIN-rail enclosures and leaves clearance for wiring gutters in a typical 150 mm deep distribution board. The 1+N-pole format occupies one module width — important for fill-factor planning when multiple RCBOs share a rail.