The Schneider Electric A9N18565 is a Vigi C120 add-on residual current device (RCD) that clips onto the outgoer side of a compatible C120 MCB. It adds earth-leakage protection to the circuit — 500 mA sensitivity, Type AC, voltage-independent tripping — without replacing the existing breaker. Rated 125 A continuous at 230…415 V AC 50/60 Hz, this 2-pole block handles the full load current of the upstream MCB. The 500 mA sensitivity is suited for general-purpose earth-leakage protection where a higher threshold is acceptable (e.g., feeder circuits, not personnel protection). The tunnel-type terminals accept 1…50 mm² rigid or 1…35 mm² flexible cable; tighten to 3.5 N·m with a 15 mm strip length.
Designed and tested to EN 61009 and IEC/EN 61009-2-1 for residual current circuit breakers with integral overcurrent protection. Rated insulation voltage 500 V AC, impulse withstand 6 kV per IEC 60947-2. Pollution degree 3 per IEC 60947-2. IP20 finger-safe terminals.