The Schneider Electric A9V26325 is a Vigi iC60 add-on residual current device (RCD) from the Acti9 range — a 3-pole, 25 A, 500 mA, Type A earth-leakage block designed to clip onto the side of an iC60 MCB. It provides voltage-independent, instantaneous residual current protection for outgoing circuits in distribution boards.
Rated 25 A at 230...415 V AC 50/60 Hz, so it protects downstream circuits up to that current on a three-phase or single-phase network. The 500 mA sensitivity is a high-threshold setting — suited for equipment protection or circuits where nuisance tripping from leakage in long cable runs or industrial loads must be avoided, not for personnel protection (which typically requires 30 mA or lower). Type A protection detects sinusoidal AC and pulsating DC residual currents, covering most modern electronic loads like VFDs, UPS systems, and switching power supplies. Rated insulation voltage 500 V AC and impulse withstand 6 kV per IEC 60947-2, with pollution degree 3 — suitable for industrial distribution panels where transient overvoltages and conductive contamination are expected. IP20 (IP40 in modular enclosure) — intended for enclosed distribution boards, not washdown environments.