FI/LS-protector, Type AC, 30 mA, 6 kA, C 10 A
The Siemens 5SU1356-1DV10 is an FI/LS-protector — a combined RCD and MCB in one 1+N-pole unit — Type AC (WS) with a residual operating current IΔn of 30 mA, rated short-circuit capacity 6 kA, and a C‑curve overcurrent trip at 10 A. The pig-tail connection simplifies wiring in distribution boards where space is tight.
Type AC means it detects sinusoidal AC residual currents only — fine for general socket-outlet and lighting circuits where no rectified or pulsed DC fault currents are expected. C‑curve (10 A) handles moderate inrush from small motor or capacitive loads without nuisance tripping.