The Schneider Electric ENW13226 is an EasyPact NW fixed-mount circuit breaker rated for 800 A at 40 °C, with a 66 kA Icu breaking capacity at 220...440 V AC 50/60 Hz per IEC 60947-2. It's a 4-pole unit (4P 3d protected poles) built for distribution duty in switchboards and industrial panels.
Both are verified at 440 V AC, the common industrial distribution voltage. The 50 kA Icw for 1 second tells you it can withstand a delayed trip from a downstream device, so you can build a selective cascade without worrying about the main blowing first.
Integration into the switchboard
This breaker mounts fixed to a rail base plate, rear-connected, with a 70 mm connection pitch without spreader. At 346 mm wide, 301 mm high, and 196 mm deep, it fits standard low-voltage switchgear cubicles. The neutral sits on the left. IP30 protection is basic finger-probe protection on the front; the real sealing happens in the enclosure.