The Schneider Electric A9KR11240BQ is an Acti9 ID K residual current circuit breaker (RCCB) — a 2-pole, 40 A, 30 mA sensitivity device for AC networks at 220-240 V, 50 Hz.
Rated 40 A (In) and 30 mA earth-leakage sensitivity. The 40 A rating suits it as a group incomer or feeder for sub-distribution boards feeding socket outlets or lighting circuits up to that load. The 30 mA trip threshold meets the touch-protection requirement per IEC 60364 for circuits supplying socket outlets. Breaking capacity is rated Idm 500 A / Im 500 A — adequate for final sub-circuits where the prospective fault current is limited by upstream protection. Insulation voltage (Ui) is 440 V AC, operational voltage (Ue) 220-240 V AC. Mechanical durability is 5000 cycles, electrical durability 4000 cycles under AC-1 (resistive) load. That is typical for an RCCB — not a switching device for frequent load make-break, but a protective device that should trip only on fault. The terminals accept up to 35 mm² rigid or 25 mm² flexible wire, with a 14 mm strip length and 3.5 N·m torque. Four 9 mm module pitches wide (36 mm).
This RCCB is a fast-moving standard part in the Acti9 range, widely stocked across distribution channels. For volume or blanket-order requirements, submit an RFQ for a firm commercial offer.