The Schneider Electric A9V39463 is an Acti9 Vigi iC60 add-on residual current device, 4 poles, rated 63 A, with a 1000 mA earth-leakage sensitivity.
The 1000 mA sensitivity and Type A-SI (Super Immunised) characteristic mean this RCD is designed for circuits where nuisance tripping from high-frequency harmonics or pulsed DC must be avoided — typical for variable-speed drives, UPS outputs, or industrial equipment with electronic loads. The 'selective' time delay (S-type) coordinates with downstream RCDs: it holds during a fault long enough for the downstream device to clear first, so only the faulted branch drops out. Rated operational voltage is 230…415 V AC, 50/60 Hz, covering single-phase and three-phase networks up to 415 V line-to-line. The 4-pole construction handles three-phase plus neutral, so it fits three-phase outgoing feeders in distribution boards. The voltage-independent tripping mechanism means the RCD detects leakage current and trips even if the phase voltage is lost — a safety advantage over electronically dependent types that may fail to trip on a lost neutral.
Clip-on mounting to DIN rail, 7 x 9 mm pitches wide (135 mm). Tightening torque 3.5 N.m. The add-on design screws directly to the outgoing side of an iC60 MCB — no extra wiring between the two.