The Schneider Electric EZC400H44400 is a 4-pole EasyPact EZC400H molded case circuit breaker rated 400 A (at 40 °C) with a thermal-magnetic TM-D trip unit. It delivers 50 kA Icu breaking capacity across 380–440 V AC, 50/60 Hz, per IEC 60947-2 — enough for most distribution panels feeding motor control centers or heavy branch loads. Fixed-mount, front-connected, IP20 finger protection. No earth-leakage module; that's a separate add-on if you need it.
Breaking capacity and what it means for your panel
The H breaking capacity code means 50 kA Icu at 440 V AC. At 240 V it jumps to 70 kA.
Fixed mount on a backplate, 44 mm connection pitch. Front connections top and bottom — standard for panel layouts where you bus the line side and run load cables out the bottom. IP20 means it's safe from finger contact but not washdown; keep it inside a closed enclosure.