The A9Q11225 is a voltage-independent add-on residual current device (RCD) from the Schneider Electric Acti9 range, designed to plug directly into an iC60 MCB for combined overcurrent and earth leakage protection in a single module. It is rated 25 A, with 2 poles, 30 mA sensitivity, Type AC (sinusoidal AC residual currents only), operating at 230…240 V AC 50/60 Hz.
Ratings and application
Type AC means it detects alternating residual currents only — not suitable for pulsating DC or smooth DC faults. The trip is instantaneous (no intentional time delay), so coordination with downstream devices must be considered. Voltage-independent operation means it does not require an external power supply to trip, unlike electronic RCDs. The 25 A rating matches the MCB it pairs with; the add-on does not itself carry interrupting capacity. It occupies a 27 mm width (3 x 9 mm pitches) on a DIN rail, with tunnel-type terminals accepting up to 25 mm² rigid or 16 mm² flexible cable. Pollution degree 3 per IEC 60947-2, impulse withstand voltage 6 kV, and insulation voltage rated 500 V AC. IP20 face, IP40 inside modular enclosure.