The A9DE3706 is a 3P+N RCBO (residual current circuit breaker with overcurrent protection) from the Acti9 iCV40 series, combining a 6 A thermal-magnetic MCB with integrated 30 mA earth-leakage protection in a single DIN-rail module. The 6 A rated current and curve C (magnetic trip 5–10 × In) suit it for protecting final sub-circuits feeding resistive and light inductive loads — lighting, small appliances, control transformers — where the inrush is moderate and the steady draw stays under 6 A. The 30 mA sensitivity covers personnel protection against direct contact (30 mA is the standard threshold for shock protection per IEC 60364). Breaking capacity is 6 kA Icn at 400 V AC, 50/60 Hz, conforming to EN/IEC 61009-2-1. Limitation class 3 (energy-limiting) means the device clears a fault fast enough to restrict let-through energy, reducing stress on downstream wiring and loads. Rated for overvoltage category III (IEC 60364) and pollution degree 3, so it is suitable for fixed installations inside a distribution board where the environment is not climate-controlled but not directly exposed to rain or condensation. IP20 on the device body, IP40 inside the modular enclosure — fine for a clean, dry panel.
Clip-on mounting to DIN rail (35 mm symmetrical rail per EN 60715). The 3P+N unit occupies 10 modules of 9 mm pitch (90 mm total width), which is the standard footprint for a 3P+N RCBO in the Acti9 range. Neutral is on the left. Connection pitch is 18 mm between phases and 9 mm between phase and neutral — standard for busbar connection in Acti9 distribution boards. The 73 mm depth fits standard shallow enclosures; the toggle control provides local ON/OFF and fault indication visible through the enclosure door.