The Schneider Electric A9R01225 is an Acti9 iID residual current circuit breaker (RCCB) — a 2-pole, 25 A unit with 30 mA earth-leakage sensitivity, Type A, rated for 220-240 V AC networks.
Rated breaking capacity Idm / Im is 1500 A at 50/60 Hz. Voltage-independent tripping means the RCCB detects leakage and opens even if the phase voltage collapses — no auxiliary supply needed. That's a reliability advantage in fault scenarios where the neutral might lift.
Terminals accept 1-35 mm² rigid or 1-25 mm² flexible conductors; strip length 14 mm, torque to 3.5 N·m. Neutral on the left, toggle control. IP20 finger-safe (IP40 inside the modular enclosure). Pollution degree 3 — suitable for ordinary indoor panel environments, not sealed for washdown.