The EZC250H44250 is a 4-pole thermal-magnetic circuit breaker from the EasyPact EZC250H series, rated 250 A at 40 °C ambient (250 A at 50 °C with the TM-D trip unit). That 250 A continuous rating sets the maximum load current it can carry without tripping — sized for a main feeder or large distribution subfeed in a panel. The H breaking capacity code means it delivers 85 kA Icu at 220–240 V AC and 36 kA at 380–415 V AC, so it can interrupt high fault currents typical of transformer-fed industrial distribution without upstream fuses taking over. At 550 V AC it still holds 10 kA Icu, covering 480 V class systems with headroom. The thermal-magnetic TM-D trip unit provides overload protection (thermal bimetal) and short-circuit protection (magnetic solenoid) in one package — no separate relay or CT needed. Category A utilization means it is not intended for cascaded selectivity with intentional short-time delay; coordination with downstream breakers relies on the instantaneous magnetic trip curve. Suitability for isolation (IEC 60947-2) confirms it can be used as a visible-break disconnector for safe maintenance.
Deployment context
Fixed backplate mount with front connections — the breaker bolts to a panel backplate, and cables land on the front terminals. The 35 mm connection pitch matches standard busbar or cable-lug spacing. Pollution degree 3 (IEC 60947) means it is rated for conductive dust or occasional condensation inside the enclosure — typical of industrial switchrooms.