The Schneider Electric A9Q21325 is an Acti9 Vigi iC60 add-on residual current device — a 3-pole, 25 A unit with 30 mA Type A earth-leakage sensitivity, rated for 400...415 V AC networks at 50/60 Hz. It clips onto the DIN rail alongside the companion iC60 MCB via the plug-in electrical connection, making it a space-efficient way to add RCD protection to an outgoing circuit without re-wiring the busbar.
The 30 mA sensitivity and Type A waveform detection cover sinusoidal AC and pulsed DC residual currents — the standard choice for circuits with single-phase electronics, appliances, or lighting where simple AC-only RCDs might not trip. The instantaneous time delay means no intentional hold-off; the device trips as soon as the leakage exceeds threshold. Voltage-independent tripping technology means the RCD operates even if the line voltage is lost, a safety advantage over electronic units. Rated operational voltage of 400...415 V AC matches standard three-phase European low-voltage distribution. The 6 kV impulse withstand and pollution degree 3 rating (IEC 60947-2) confirm it handles typical industrial transient environments and conductive-dust conditions inside a panel. The 73.5 mm depth and 54 mm width (6 x 9 mm pitches) mean it occupies the same horizontal footprint as a standard 3P MCB on the DIN rail. The bottom tunnel terminals accept 1...25 mm² rigid or 1...16 mm² flexible conductors, with a tightening torque of 2 N.m and 14 mm strip length — standard for panel wiring.
Compliant with EN/IEC 61009-1 and EN/IEC 61009-2-1 (residual current operated circuit-breakers with integral overcurrent protection — though this is the add-on RCD module, it is tested to the same family standard). IP20 on the terminals, IP40 within the modular enclosure. Storage temperature range -40...85 °C, operating -25...60 °C.