The Schneider Electric A9Z51425 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID series, rated at 25 A with 30 mA earth-leakage sensitivity. It is a Type B-EV device, specifically designed to protect EV charging circuits where DC leakage currents from the vehicle's onboard charger can blind standard AC-only RCDs.
Clip-on mounting to DIN rail, 9 module pitches (9 x 18 mm = 162 mm wide). Neutral on the left. Tightening torque 3.5 N·m. IP20 on the body, IP40 inside a modular enclosure — standard for distribution board fit.
Certified to IEC 61008-2-1, IEC/EN 62423, and EN 61008-2-1. Carries VDE and NF quality labels. Pollution degree 3, overvoltage category IV, rated insulation voltage 500 V. Impulse withstand 3 kA (8/20 µs) per EN/IEC 61008-1.
