The Schneider Electric EZC250F3150 is a 3-pole molded case circuit breaker from the EasyPact EZC250F range, rated 150 A at 40 °C with a thermal-magnetic TM-D trip unit. It's built for distribution duty in fixed-mount backplate panels — the 105 mm wide, 165 mm high, 60 mm deep footprint fits standard enclosure cutouts. The 10 kA Icu at 440 V AC (18 kA at 380 V, 25 kA at 240 V) covers most commercial and light industrial service-entrance and feeder applications where fault levels stay under that ceiling. Category A utilization means it's not intended for motor starting — this is a distribution breaker, not a motor circuit protector.
Breaking capacity across voltage — the real-world read
The interrupting rating climbs as system voltage drops: 25 kA Icu at 240 V AC, 18 kA at 380 V, 15 kA at 400–415 V, and 10 kA at 440 V. The DC side is more modest: 5 kA Icu at 125 V DC (1-pole) or 250 V DC (2-pole). The 690 V insulation voltage (Ui) gives headroom for 480/277 V systems common in North American commercial panels.
Fixed-mount on a backplate — no DIN-rail adapter on this frame. The toggle handle provides positive contact indication (ON/OFF visible on the front face). IP20 finger-safe protection on the front; IK07 impact resistance covers incidental tool drops.