The Schneider Electric A9W26325 is an Acti9 Vigi iC60 add-on residual current device (RCD) — a 3-pole, 25 A, 500 mA, Type A earth-leakage block designed to clip onto the downstream side of an iC60 MCB. It is voltage independent, meaning it trips on residual current even if the line voltage is lost, and it provides instantaneous protection (no intentional time delay). The unit occupies 6 x 9 mm pitches on a DIN rail, with a depth of 74 mm, width 108 mm, and height 91 mm.
The A9W26325 is listed as Obsolete by the manufacturer. If your project is still in design, a qualified alternative from the same Acti9 family should be evaluated to avoid future requalification churn.
The 25 A rated current (In) and 500 mA earth-leakage sensitivity define the load and protection profile: this block protects a 25 A outgoing circuit against ground faults above half an amp. Type A detection covers sinusoidal AC and pulsating DC residual currents — the standard for most single-phase electronics and motor drives. The instantaneous trip (no delay) means it will clear a fault in under a cycle, but it also means nuisance tripping on circuits with high inrush or capacitive leakage; that is a design constraint to check before specifying. The voltage-independent trip mechanism is an advantage on circuits where the supply may be interrupted before the fault clears.
Panel Integration & Wiring
The unit is rated IP20 (finger-safe) and IP40 inside a modular enclosure. The trip indicator gives local visual confirmation of a residual-current trip, which aids fault isolation on a multi-circuit panel.
Standards & Electrical Ratings
Designed and tested to IEC 61009-1 and EN 61009-1 (RCBO standard). Rated operational voltage (Ue) is 400 V AC 50/60 Hz per EN 61009-1, or 230/415 V AC per IEC 61009-1. Rated insulation voltage (Ui) is 500 V AC. Impulse withstand voltage (Uimp) is 6 kV. The unit also withstands 8/20 µs impulse currents up to 250 A per IEC 61009-1. Storage temperature range -40…85 °C; operating -25…60 °C.