The Schneider Electric A9V14425 is an Acti9 Vigi iC60 add-on residual current device (RCD) — a 4-pole, voltage-independent earth leakage block rated at 25 A with 300 mA sensitivity, Type AC, instantaneous trip. It clips onto the bottom of an Acti9 iC60 MCB via screw connection, occupying 6 x 9 mm pitches (54 mm wide) on DIN rail.
This part is listed as obsolete by the manufacturer. No official successor is recorded in the evidence. Availability runs through independent surplus and broker channels — not the factory or its authorized distributors.
The 25 A rated current and 300 mA earth-leakage sensitivity suit it for downstream final circuits in a TN or TT system at 400/415 V AC, 50/60 Hz.
IP20 on the body, IP40 inside a modular enclosure.
Designed and tested to IEC 61009-1 and EN 61009-1. Rated insulation voltage (Ui) 500 V AC; rated impulse withstand voltage (Uimp) 6 kV per IEC 60947-2. The 8/20 µs impulse withstand rating of 250 A per IEC 61009-1 confirms it handles typical surge currents without nuisance tripping. The local trip indicator gives visual confirmation of the tripped state.