The A9Q14340 is a 3-pole add-on residual current device from the Acti9 Vigi iC60 range, rated 40 A with 300 mA earth-leakage sensitivity, Type AC, instantaneous trip. Rated operational voltage is 230...415 V AC at 50/60 Hz, and it meets EN/IEC 61009-1 and EN/IEC 61009-2-1. That 300 mA sensitivity means it protects against earth faults in circuits where a 30 mA device would nuisance-trip — think lighting, general-purpose socket outlets, or distribution subfeeds where the leakage budget is higher.
IP20 rated for the device body; IP40 when enclosed in a modular enclosure.
Earth-leakage protection is voltage-independent — the trip mechanism doesn't rely on the line voltage to detect a fault, so it still operates even if the neutral is lost upstream. The impulse withstand is 250 A at 8/20 µs waveform per IEC 61009-1, which covers most surge events in a standard distribution board. Rated insulation voltage (Ui) is 500 V AC; rated impulse withstand (Uimp) is 6 kV per IEC 60947-2. Storage temperature range is -40...85 °C; operating range is -5...60 °C.