The Schneider Electric A9R11263 is a 2-pole Acti9 iID residual current circuit breaker (RCCB) rated for 63 A continuous load with a 30 mA earth-leakage sensitivity. The 30 mA trip threshold is the standard for personal shock protection in residential and commercial final circuits — it clears a fault before the heart's vulnerable fibrillation window.
The 63 A [In] means it passes the full current of a typical main switch or large cooker circuit; the 30 mA sensitivity (Type AC) catches sinusoidal AC leakage only, not pulsed DC or smooth DC faults. If the downstream load includes VFDs, LED drivers, or switching power supplies that generate non-sinusoidal leakage, a Type A or Type B RCCB is needed instead. Breaking and making capacity is rated at Idm 1500 A and Im 1500 A — that is the fault current this RCCB can safely interrupt under the residual-current and overcurrent conditions defined in EN/IEC 61008-1. The 250 A surge current rating (8/20 µs impulse) confirms it withstands lightning-induced or switching transients without nuisance tripping. Insulation voltage is 500 V AC, so it is suitable for 400 V three-phase systems when used on a single-pole leg (phase-to-neutral).
Terminals accept 1...35 mm² rigid or 1...25 mm² flexible cable; strip length 14 mm, tighten to 3.5 N·m. The toggle actuator provides a clear contact-position indicator, and the enclosure carries a padlocking provision for lockout/tagout. IP20 on the body, IP40 inside a modular enclosure — keep the panel door closed during washdown.