The Schneider Electric A9R54425 is a 4-pole Acti9 iID residual current circuit breaker (RCCB) rated for 25 A continuous current with 300 mA earth-leakage sensitivity. The voltage-independent tripping mechanism means it clears a ground fault even if the line voltage is lost — a key safety advantage in installations where a lost neutral could mask a fault.
Clip-on mounting to a DIN rail, 72 mm wide (8 x 9 mm pitches), 91 mm tall, 73.5 mm deep. Terminals accept up to 35 mm² rigid or 25 mm² flexible conductors; strip length 14 mm, torque to 3.5 N·m. IP20 finger-safe on the front, IP40 inside a modular enclosure.
Pollution degree 3 (industrial environment). Rated impulse withstand voltage 6 kV. Electrical durability 15,000 cycles (AC-1), mechanical durability 20,000 cycles.