The Schneider Electric A9R71263 is an Acti9 iID residual current circuit breaker (RCCB) — a 2-pole, 63 A device with 30 mA earth-leakage sensitivity, Type AC, rated for 220...240 V AC at 50/60 Hz.
The 63 A [In] rated current sets the continuous load capacity — sized for a main incomer or sub-feed on a 63 A circuit. The 30 mA sensitivity catches leakage to earth at a level that protects against direct-contact shock (the standard threshold for personal protection per IEC 60364). The voltage-independent tripping technology means the RCCB detects and clears earth faults even if the phase voltage collapses, a useful safety margin on a degraded supply. Rated impulse withstand voltage [Uimp] is 6 kV, and the device carries an 8/20 µs impulse withstand of 250 A per EN/IEC 61008-1 — it will ride through typical surge events without nuisance tripping.
This RCCB is an outgoer device — it sits downstream of the main switch or breaker, protecting a branch circuit. The clip-on DIN-rail mount and 36 mm width (4 modules) fit standard modular enclosures. IP20 body rating means it is intended for a closed panel or distribution board, not for wet or outdoor locations.