The Schneider Electric A9R74225 is an Acti9 iID residual current circuit breaker (RCCB) — a 2-pole, voltage-independent device rated for 25 A continuous load at 220-240 V AC, 50/60 Hz. Its 300 mA earth-leakage sensitivity (Type AC) catches sinusoidal AC fault currents, tripping instantaneously with no auxiliary supply needed. That voltage-independent design means it clears a ground fault even if the line voltage has collapsed — a real advantage in degraded supply conditions.
Clip-on mounting to DIN rail, 36 mm wide (4 x 9 mm pitches), 91 mm tall, 73.5 mm deep — slots into a standard modular enclosure alongside other Acti9 devices. IP20 on the body, IP40 inside the modular enclosure per IEC 60529.
Pollution degree 3 suits it for industrial control panels where conductive contamination is possible. The 8/20 µs impulse withstand of 250 A confirms it handles surge events without nuisance tripping.