The Schneider Electric A9V39363 is an Acti9 Vigi iC60 add-on residual current device — 3-pole, rated 63 A, with a 1000 mA selective earth-leakage sensitivity. It clips onto the DIN rail alongside the iC60 MCB and connects via screw terminals, giving a combined RCBO function in a modular footprint.
The 1000 mA sensitivity is selective (time-delayed), so it coordinates downstream of a 300 mA or 30 mA RCD — the selective unit holds during a fault to let the downstream device clear first, avoiding a whole-panel trip. The Type A-SI (Super Immunised) designation means it resists nuisance tripping from pulsed DC fault currents and high-frequency leakage typical of VFDs, UPS systems, and LED drivers. Voltage-independent tripping means it clears a ground fault even if the line voltage collapses — no auxiliary supply needed. The 6 kV impulse withstand (Uimp) and pollution degree 3 rating suit fixed-installation environments where transient overvoltages and conductive dust are expected.
Clip-on mounting to DIN rail, 7 x 9 mm pitch modules wide (117 mm). Tunnel-type terminals on the bottom accept 1...35 mm² rigid or 1...25 mm² flexible cable; strip length 14 mm, tighten to 3.5 N·m.