The A9R91225 is a Schneider Electric Acti9 iID residual current circuit breaker (RCCB), 2-pole, rated 25 A at 220-240 V AC, 50/60 Hz. Earth-leakage sensitivity is 30 mA, Type A-SI (Super Immunised) — voltage-independent tripping that resists nuisance trips from surge currents and high-frequency harmonics common on modern electronic loads (switched-mode power supplies, VFDs, LED drivers). The 30 mA threshold covers standard personnel protection per IEC 61008-1.
Clip-on mount to DIN rail, 36 mm wide (4 x 9 mm pitches), 91 mm tall, 73.5 mm deep. Neutral on the left. IP20 finger-safe terminals; IP40 inside the modular enclosure. Wire capacity: 1-35 mm² solid or 1-25 mm² flexible (with or without ferrule), strip length 14 mm, torque to 3.5 N·m. Padlocking provision for lockout/tagout.