The Schneider Electric A9R71263S is a 2-pole residual current circuit breaker (RCCB) from the Acti9 iID series, rated 63 A with 30 mA earth-leakage sensitivity. The 63 A continuous rating means it can serve as the main incoming protection for a sub-distribution board or feed a high-load circuit like a commercial kitchen or HVAC unit, provided the upstream breaker coordinates. For higher fault-current locations, check the upstream MCB or fuse coordination. That means it is suited for circuits with purely resistive or inductive loads (heaters, motors, lighting with standard ballasts). It is NOT rated for pulsating DC or mixed-frequency fault currents that come from electronics, variable-speed drives, or EV chargers; for those loads you need a Type A or Type B device. The tripping technology is voltage-independent, so it operates without needing an external power supply — the fault current itself provides the energy to trip the mechanism.
Neutral is on the left. Terminals accept up to 35 mm² rigid or 25 mm² flexible cable, with a stripping length of 14 mm and a tightening torque of 3.5 N·m. The IP20 body is standard for enclosed distribution boards; the IP40 rating applies when installed in a modular enclosure. Padlocking provision allows lockout/tagout for safe maintenance.
Designed and certified to EN/IEC 61008-1 and EN/IEC 61008-2-1, the harmonized European standards for residual current operated circuit-breakers without integral overcurrent protection. Rated insulation voltage 500 V AC, impulse withstand voltage 6 kV. Pollution degree 3 (industrial environment, conductive pollution possible). The 8/20 µs impulse withstand of 250 A per EN/IEC 61008-1 means it survives common lightning-induced surges on the supply without nuisance tripping or damage.