The EZC250H4150 is a 4-pole molded-case circuit breaker from the Schneider EasyPact EZC250H series, rated 150 A at 40 °C and carrying a TM-D thermal-magnetic trip unit. The trip unit rating of 150 A at 50 °C means the breaker holds full rated current up to that ambient — above that, you need to consult the thermal derating curve. Breaking capacity varies by voltage: 85 kA Icu at 220–240 V AC, 36 kA at 380–415 V AC, 25 kA at 440 V AC, and 10 kA at 550 V AC. For DC applications, it delivers 30 kA Icu at 125 V DC (1-pole) or 250 V DC (2-pole). The 'H' breaking capacity code positions it for high-fault installations where upstream coordination demands a robust interrupt rating.
This breaker mounts fixed to a backplate — no DIN-rail clip, so plan for drilled mounting holes or a sub-panel. The 140 mm width and 165 mm height with 60 mm depth fit a standard distribution board footprint; the 35 mm connection pitch matches common busbar and lug spacing. Front connections both top and bottom simplify busbar runs and cable entry. IK07 impact rating handles incidental tool drops during maintenance.