The Schneider Electric EZC630H3500N is a 3-pole EasyPact EZC630H moulded-case circuit breaker rated 630 A at 40 °C, with a thermal-magnetic TM-D trip unit. It provides short-circuit and overload protection for distribution applications, with a breaking capacity of 50 kA Icu at 380 V AC and 50/60 Hz per IEC 60947-2. The 630 A frame means it handles high-current feeds — main switchboard incomers, large motor control centre busbars, or transformer secondary protection — where the 50 kA fault level is common in industrial plant.
The magnetic trip is fixed at 6000 A, giving an instantaneous pickup of roughly 10× In — typical for distribution-grade MCCBs, meaning it clears high-impedance faults quickly but will ride through motor inrush on downstream starters. Breaking capacity is 50 kA Icu at 380 V, 440 V, and 400/415 V — the same 50 kA holds across the common industrial voltage band. At 220/230 V it rises to 70 kA. For a distribution board with a transformer secondary fault current of 45 kA, this breaker holds the line; above 50 kA you need the H- or L-frame variant. The breaker is Category A (no intentional short-time delay), so it trips instantaneously on fault — selectivity with downstream devices relies on current discrimination, not time grading. Mechanical durability is 10 000 cycles, electrical durability 3000 cycles at 415 V — adequate for a main breaker that operates a few times a year, but not for a switching duty like a welding machine or frequent motor start. The IP20 finger-safe enclosure and IK07 impact resistance protect against accidental contact and light mechanical shock inside the panel.
Fixed-mount via backplate — no DIN-rail adapter. The 140 mm width × 255 mm height × 110 mm depth footprint fits standard panel cutouts for 630 A frame MCCBs. Front connection both top and bottom; connection pitch is 45 mm. Toggle control with positive contact indication; the suitability-for-isolation mark (per IEC 60947-2) means the breaker can be used as a disconnecting means — no need for a separate isolator upstream.