The Schneider Electric EasyPact EZC630N44500N is a 4-pole molded-case circuit breaker (MCCB) rated 630 A at 40 °C, built for distribution applications in commercial and industrial panels. It carries a TM-D thermal-magnetic trip unit — thermal for overload protection, magnetic for short-circuit — with a magnetic tripping threshold of 5000 A. The 36 kA Icu at 440 V AC (50/60 Hz) per IEC 60947-2 tells you it can safely interrupt a fault up to that level without welding contacts or cascading upstream. That's the number that governs selectivity coordination with downstream breakers.
Fixed backplate mount, front-front connections (line and load both front-accessible). The 140 mm width and 255 mm height mean it occupies a standard MCCB footprint on a backplate or inside a distribution cabinet. Connection pitch is 45 mm — lines up with common busbar systems. IP20 finger-safe terminals per IEC 60529; IK07 impact rating per EN 50102 means the enclosure shrugs off a 2 J hammer blow during installation.