The Schneider Electric A9C52440 is an Acti9 Reflex iC60N integrated control circuit breaker — a single device that combines remote-controlled switching and overcurrent protection in a 4-pole, 40 A, curve C package. It's built for control and distribution panels where you need to toggle a load remotely (by maintained or impulse signal) while keeping thermal-magnetic protection on the same DIN-rail footprint. The 20 kA Icu at 230 V AC (10 kA at 400 V) is enough for most commercial and light industrial sub-distribution boards; the N breaking capacity code tells you it's the standard-interrupting variant in the iC60 family, not the high-performance L or H.
Control voltage options span 24 V AC/DC, 48 V AC/DC, and 230 V AC — the 24 V DC option is handy for PLC-driven panels where you want to avoid running mains-voltage control wires.
The Reflex iC60N is designed for control and distribution applications — think panel builders wiring up lighting contactor panels, HVAC control cabinets, or small motor control centres where the same breaker handles both remote switching and overcurrent protection. The 35 mm symmetrical DIN-rail mount (fixed) keeps installation quick. IP20 means it's for dry indoor enclosures only; if the panel sees washdown or dust, it lives behind a higher-IP enclosure door. The padlockable OFF position (with contact position indicator) satisfies lockout/tagout requirements without an external lockout hasp. Separate earth-leakage block means you can add RCD protection later if needed, but it's not built in.