The Schneider Electric A9V31363 is an add-on residual current device from the Acti9 Vigi iC60 range, rated 63 A with 30 mA earth-leakage sensitivity. The 30 mA trip threshold covers personnel protection (indirect contact) per IEC 61009-1, while the Type A-SI (Super Immunised) designation means it resists nuisance tripping from pulsed DC earth faults and high-frequency leakage — common on variable-speed drives, UPS systems, and LED lighting circuits in commercial or industrial panels. Rated operational voltage is 400-415 V AC, 50/60 Hz, with a rated insulation voltage of 500 V AC and impulse withstand of 6 kV. The instantaneous trip characteristic clears faults without intentional delay, so coordination with downstream RCDs needs attention.
Mounts on DIN rail via clip-on; the 3P body occupies 7 x 9 mm pitches (63 mm width). Tunnel terminals on the bottom accept up to 35 mm² rigid cable or 25 mm² flexible with/without ferrule; strip length is 14 mm, tighten to 3.5 N·m. IP20 rated (finger-safe), IP40 inside a modular enclosure.