The Schneider Electric A9DH3706 is an Acti9 iCV40 RCBO — a combined residual-current circuit breaker with overcurrent protection — rated 6 A, B curve, 30 mA earth-leakage sensitivity, 3P+N poles, and a 6 kA breaking capacity at 400 V AC per EN/IEC 61009-2-1. The 30 mA sensitivity means it protects against direct-contact faults in circuits supplying socket outlets or portable equipment, where IEC 60364 requires ≤30 mA RCD protection.
The 6 A rated current (In) sets the continuous load it can carry — sized for lighting or small appliance final circuits, not motor or heater loads. The B-curve magnetic trip (3–5 × In) means it trips instantaneously between 18 A and 30 A, suited for resistive or low-inrush loads where you want fast fault clearance without nuisance trips from cable charging currents. The 30 mA earth-leakage threshold is the standard for personal protection in residential and commercial socket circuits. Integrated earth-leakage protection eliminates the need for a separate RCD module — one device, one DIN width. The 3P+N configuration (switched neutral on the left) suits three-phase outgoers where the neutral is switched and protected. Connection pitch is 18 mm between phases, 9 mm between phase and neutral, matching standard busbar systems.
Deployment context
Clip-on DIN-rail mounting (per EN 60715) with tunnel terminals accepting 1–16 mm² rigid or 1–10 mm² flexible cable. Tightening torque 2 N·m. IP20 finger-safe terminals; IP40 in a modular enclosure. Operating altitude limited to 2000 m without derating.