The Schneider Electric A9R50425 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID K series, rated at 25 A with 30 mA earth-leakage sensitivity. The 30 mA sensitivity is the standard threshold for personal protection against indirect contact in residential and commercial final circuits (IEC 60364-4-41). Rated operational voltage is 380...415 V AC at 50/60 Hz, with an insulation voltage of 440 V AC. The breaking and making capacity is rated at 500 A (Idm and Im), which covers fault clearing on most final sub-distribution boards. The unit is designed for outgoer positions in the distribution panel. Clip-on mounting onto a DIN rail (8 x 9 mm pitches) and tunnel-type terminals accepting 1...35 mm² rigid or 1...25 mm² flexible cable make it a straightforward panel fit. IP20 (finger-safe) on the front, IP40 within a modular enclosure — standard for distribution boards.
It carries VDE quality label. Pollution degree 2 (normal, non-conductive pollution) and 8/20 µs impulse withstand at 200 A per EN/IEC 61008-1 are specified for the electromagnetic compatibility.
