The Schneider Electric EZC630H4400N is a 4-pole EasyPact EZC630H moulded-case circuit breaker with a TM-D thermal-magnetic trip unit rated 400 A at 50 °C and 630 A at 40 °C. It breaks 50 kA Icu at 440 V AC 50/60 Hz per IEC 60947-2 — that's the fault-clearing capacity for a 440 V distribution panel feeding a whole line. Category A utilisation means it's not intended for motor starting duty; it's a distribution breaker, sized for a main or heavy feeder.
Fixed-mount, backplate support. Front-connect both line and load. 185 mm wide, 255 mm high, 140 mm deep — that's a 4-pole frame that fits a standard distribution panel cutout. Connection pitch is 45 mm. IP20 on the enclosure, IK07 impact resistance.
Magnetic tripping current is 3500 A — that's the instantaneous pickup for short-circuit protection. Electrical durability is 3000 cycles at 415 V AC, mechanical durability 10,000 cycles. No earth-leakage protection built in; no neutral protection (solid neutral).