It is rated 25 A (In) with 30 mA earth-leakage sensitivity, Type A (pulsating DC and AC fault currents), for 230 V AC 50 Hz phase-to-neutral networks. The auto-recloser logic is the key differentiator: after a fault trip, it waits 10 s, then attempts up to 3 reclosures with a 180 s minimum interval between closing attempts. If the insulation fault persists, the cycle stops. This is designed for transient faults — lightning-induced leakage, moisture on a cable — where a manual reset would be impractical on an unattended outgoer.
Occupies 6 x 9 mm pitches (54 mm width,). Depth is 82 mm, height 106 mm. Neutral is on the left. The device is intended as an outgoer in TN-S or TT earthing systems.
The 25 A rating matches a 25 A MCB upstream for selectivity. Compliant with EN 50557, the standard for automatic reclosing devices (ARDs) for RCCBs. The manual test function operates above 100 V. Mechanical durability is 4000 open-close cycles. The minimum leakage resistance to prevent reclosure is 16 kΩ when operating, 8 kΩ when non-operating. The device includes 8/20 µs surge immunity to 250 A, protecting the electronics against lightning-induced transients on the line.