The Schneider Electric A9N21484 is a Vigi TG40 add-on residual current device from the Prodis range, designed to clip onto the side of a compatible MCB to provide earth leakage protection in a single module width (18 mm).
Mounts via clip-on to a DIN rail, occupying 2 x 9 mm pitches (18 mm total width). Rated operational voltage is 230 V AC phase-to-neutral at 50 Hz, with an insulation voltage of 400 V AC. The IP20 enclosure suits clean, dry panel environments — not washdown or outdoor locations.
Complies with IEC 60947-2, EN 61009-1, and EN 61009-2-1. Pollution degree 3 per EN 61009-1, impulse withstand voltage 6 kV. The residual current tripping technology is voltage-independent, so it operates even if the supply neutral is lost.