The Schneider Electric EZCV250N44150 is a 4-pole EasyPact EZCV250N moulded-case circuit breaker rated 150 A at 40 °C with a TM-D thermal-magnetic trip unit and integral earth-leakage protection. The TM-D trip gives a fixed thermal curve for overloads and a fixed magnetic pickup for short-circuits; no adjustment dials, so the breaker is a straight drop-in for a known load. Breaking capacity is 20 kA Icu at 440 V AC, 25 kA at 380–415 V, and 85 kA at 220–240 V. IP20 finger-safe on the front; inside a locked panel that is standard. IK07 impact rating means it survives a 2 J hammer blow — enough for accidental tool contact during commissioning.
Fixed backplate mount with front connections top and bottom — the breaker bolts to a mounting plate, and cables land on the front terminals. The 35 mm connection pitch is standard for busbar take-offs. The toggle handle protrudes forward.