The 1P+N pole arrangement with neutral on the left fits standard single-phase group incomer positions in Acti9 distribution boards.
40 A rated current and 30 mA sensitivity are the two numbers that decide whether this RCD matches your branch circuit. Type A detection covers both sinusoidal AC and pulsating DC — common for circuits feeding electronics, appliances, or LED drivers that generate half-wave rectified leakage. Voltage-independent tripping means the RCD operates without needing a power supply from the line — it uses the fault energy itself to trip, so protection remains active even if the neutral is lost upstream. Instantaneous time delay (no intentional delay) means it trips within the standard 300 ms window for 1× IΔn, as required by EN/IEC 61009-2-1. Rated insulation voltage 400 V AC and impulse withstand 4 kV (Ui and Uimp) confirm the device is rated for 230/400 V TN or TT systems.
Clip-on mounting on DIN rail — snaps onto the rail without tools. The module is 36 mm wide (2 x 9 mm pitches), 102.5 mm tall, 74 mm deep. Tunnel-type terminals accept 1…16 mm² rigid or 1…10 mm² flexible cable; tighten to 2 N·m. IP20 on the device body (finger-safe), IP40 inside the modular enclosure — suitable for installation in a distribution board with a cover. Ambient operating range -25…60 °C, storage -40…85 °C, altitude up to 2000 m. Relative humidity 95 % at 55 °C.