The Schneider Electric EZCV250N44125 is an EasyPact EZCV250N moulded-case circuit breaker (MCCB) rated 125 A at 40 °C, with a 4-pole configuration (4P) for three-phase plus neutral distribution. It uses a thermal-magnetic TM-D trip unit and includes integral earth-leakage protection, overload protection, and short-circuit protection — all in one package. The breaking capacity is 20 kA Icu at 440 V AC 50/60 Hz per IEC 60947-2, with higher ratings at lower voltages: 25 kA at 380–415 V and 85 kA at 220–240 V.
Fixed backplate mounting — no DIN-rail clip. The 140 mm width × 165 mm height × 68 mm depth footprint fits standard distribution panel cutouts. Connection pitch is 35 mm, matching common MCCB terminal spacing. IP20 finger-safe enclosure means it's protected against accidental contact but not washdown — panel interior only.
The TM-D trip unit gives a fixed thermal curve for overloads and a magnetic pickup for short-circuits; it's not adjustable, so coordination studies need to respect the fixed curve. Earth-leakage protection is built in — no separate RCCB or RCBO needed for that function. Pollution degree 3 allows installation in environments with conductive pollution (condensation, light dust).