The Schneider Electric A9D01620 is an Acti9 iDPN N Vigi RCBO — a combined overcurrent and residual-current device in a single 1P+N module. It clips onto a DIN rail and occupies 4 pitches at 9 mm per pole, so it fits a standard 36 mm-wide slot in a distribution board.
Rated 20 A (In) with a C-curve magnetic trip (5–10 × In), so it handles moderate inrush from motor-starters or small transformers without nuisance tripping, yet clears a hard short fast. Breaking capacity is 6 kA Icn at 110 V AC per EN/IEC 61009-2-1 — that is the maximum fault current it can safely interrupt. The integrated earth-leakage protection trips at 30 mA sensitivity, which covers personnel protection in most residential and light-commercial outgoer circuits.
Mounts via clip-on to DIN rail. Wire range: 1–16 mm² rigid, 1–10 mm² flexible, or 1–10 mm² flexible with ferrule. Strip length 15 mm, torque terminals to 2 N·m. IP20 on the body, IP40 inside a modular enclosure. Neutral is on the left; local signalling shows ON, OFF, and fault-trip status.