The Schneider Electric A9D61620 is a 1P+N RCBO from the Acti9 iDPN Vigi range, combining overcurrent and earth-leakage protection in a single 36 mm wide DIN-rail module. It carries a 20 A rated current with a C-curve magnetic trip (5...10 x In) and 30 mA earth-leakage sensitivity, so it protects both the circuit and personnel against ground faults. The breaking capacity is 6000 A Icn at 110...240 V AC, 50 Hz, per EN/IEC 61009-2-1 — enough for most residential and light commercial distribution boards where the prospective fault current stays under that threshold.
The 20 A thermal-magnetic trip is sized for lighting, socket-outlet, or small-appliance circuits drawing up to 16 A continuous load — standard practice is to derate to 80% of the breaker rating for continuous loads per IEC 60364. The 30 mA residual-current element provides personnel protection (30 mA is the IEC threshold for preventing ventricular fibrillation) and also covers fire-risk detection from leakage to earth. The limitation class 3 means the RCBO limits let-through energy to a low level, which helps with downstream coordination and reduces arc-flash stress on the connected equipment. Integrated earth-leakage protection eliminates the need for a separate RCCB upstream for this circuit — the iDPN Vigi packs both overcurrent and residual-current functions into one 4-pitch (36 mm) module. That saves two DIN spaces compared to a separate MCB + RCCB pair, which matters when the panel fill factor is tight.
Clip-on mounting onto a standard DIN rail — no screws needed for the rail attachment. The IP20 rating covers the terminals against finger contact; the modular enclosure achieves IP40 inside the panel, so it's suited for distribution boards in dry indoor environments. The toggle provides local ON, OFF, and fault-trip indication — a red flag or a tripped position that stays visible even after the handle is reset, which speeds up fault isolation on a multi-circuit board.