The Schneider A9DH3606 is an Acti9 iCV40N residual-current circuit breaker with overcurrent protection (RCBO) — a single module that combines a 6 A thermal-magnetic MCB with a 30 mA earth-leakage trip in a 1P+N format. The B-curve (magnetic trip 3–5 × In) means it clears short-circuit faults fast enough for residential or light commercial final circuits feeding socket outlets or lighting — the standard choice where inrush from loads like small motors or fluorescent ballasts is modest.
Rated 6 A continuous at 230 V AC, 50/60 Hz, with a breaking capacity of 6000 A Icn per EN/IEC 61009-2-1. The 30 mA earth-leakage sensitivity provides personal protection against direct contact (the standard threshold for socket circuits in many national wiring rules). Limitation class 3 (energy-limiting) means it restricts let-through energy under fault, helping downstream selectivity and reducing arc-flash stress on the cable. Thermal-magnetic trip technology: the thermal bimetal handles overloads (time-delayed), while the solenoid trips instantaneously on short-circuit between 3 and 5 × In (18–30 A for this 6 A unit). The neutral is on the left, phase on the right — wire it in that order to keep the internal mechanism oriented correctly. Tunnel terminals accept 1–16 mm² rigid or 1–10 mm² flexible; strip 14 mm and torque to 2 N·m.