The Schneider Electric A9Z24225 is an Acti9 iID residual current circuit breaker (RCCB) — a 2-pole device rated 25 A with 300 mA earth-leakage sensitivity, Type A, for AC networks at 50/60 Hz and 220…240 V operational voltage. The 300 mA sensitivity makes it suitable for general protection in circuits where a higher threshold is acceptable (e.g., distribution sub-mains, lighting, or socket circuits not serving portable equipment), while the Type A classification means it detects pulsating DC residual currents in addition to sinusoidal AC — common in circuits with rectifiers, switching power supplies, or single-phase drives. The 6 kV impulse withstand voltage (Uimp) and pollution degree 3 rating confirm it is built for fixed-installation panels in industrial or commercial environments, not just residential.
Neutral is on the left.