The Schneider Electric A9W31463 is an add-on residual current device (RCD) from the Acti9 Vigi iC60 range, designed to clip onto the outgoing side of an iC60 MCB via screw connection. It occupies 7 modules of 9 mm pitch on a DIN rail, so it takes 63 mm of panel width — plan your enclosure fill factor accordingly. The 4-pole unit is rated for 63 A continuous and trips instantaneously on a 30 mA earth leakage, Type A-SI (Super Immunised), meaning it handles pulsed DC fault currents and resists nuisance tripping from high-frequency harmonics common on modern electronic loads.
Rated operational voltage is 400/415 V AC at 50/60 Hz, per IEC 61009-1 — this is the standard three-phase line-to-line voltage in European TN and IT systems. The insulation voltage is 500 V AC, and the impulse withstand is 6 kV, so the device coordinates with typical distribution board overvoltage categories. The 30 mA sensitivity is the standard for personnel protection (shock risk) in most IEC-based codes. Type A-SI (Super Immunised) is voltage-independent — it trips on the residual current itself, not on a powered electronic circuit — so it remains functional even if the neutral is lost upstream. The 8/20 µs impulse withstand of 3000 A means it survives surge events without nuisance tripping, per IEC 61009-1. Terminals accept 1 to 35 mm² rigid or 1 to 25 mm² flexible cable; tightening torque is 3.5 N·m. Strip length is 14 mm. The IP20 rating covers the device body; the modular enclosure meets IP40 when installed in a panel.