The EZC630H44600N is a 4-pole EasyPact EZC630H moulded-case circuit breaker rated 630 A at 40 °C ambient — the current you spec for the main feeder or large motor branch, not a subfeed. The TM-D thermal-magnetic trip unit gives fixed overload and short-circuit protection curves; no interchangeable rating plugs or electronic adjustments here, so the 630 A frame is the trip rating, not just a frame size you can down-rate. That simplifies BOM but means you commit to the full 630 A or drop to a smaller frame. Breaking capacity is 50 kA Icu at 380/400/415/440 V AC (50/60 Hz) per IEC 60947-2, and 70 kA Icu at 220/230 V AC. For a 630 A distribution breaker on a 400 V industrial panel, 50 kA Icu gives solid headroom over typical utility fault levels (usually 25–35 kA at the service entrance). The H breaking capacity code in EZC630H signals this is the high-interrupting variant of the EZC630 family. For frequent switching duty, add a contactor downstream.
Deployment context
Fixed mounting on a backplate with front-front connections — line and load cables both terminate on the front face. The 185 mm width, 255 mm height, and 140 mm depth require clearance for 630 A conductors. IP20 finger-safe protection on the front and IK07 impact resistance cover normal panel installation. This is not a washdown-rated enclosure — keep it inside a cabinet rated IP54 or better if the environment is wet or dusty.
Standards compliance covers GB/T 14048.2, JIS C8201-2-2, EN/IEC 60947-1, and EN/IEC 60947-2. No UL or CSA listing is stated in the evidence. Toggle control with positive contact indication gives a visible break confirmation — the handle position shows the contact state even if the mechanism fails internally. That is a useful diagnostic cue for field service techs isolating a faulted feeder: you see the handle in the OFF or tripped position and know the contacts have opened.