The Schneider Electric A9KR12263BQ is a 2-pole Residual Current Circuit Breaker (RCCB) from the Acti9 ID K series, rated at 63 A with 100 mA earth-leakage sensitivity. The part is voltage-independent in its tripping mechanism, so it clears a ground fault even if the line voltage is lost.
Ratings and deployment
The breaking and making capacity is rated at Idm 630 A / Im 630 A. This RCCB clips onto a DIN rail (36 mm width, 2 module pitches) and is intended as a group incomer in a distribution board. The IP20 finger-safe terminals accept up to 35 mm² rigid or 25 mm² flexible conductors, with a stripping length of 14 mm and a tightening torque of 3.5 N.m. The instantaneous trip characteristic means there is no intentional time delay — the device reacts to the residual current within its operating curve. Electrical durability is rated at 4000 cycles under AC-1 (resistive) load, with 5000 mechanical cycles.