The Schneider Electric C063H42EFM is a ComPacT NS new generation 4-pole fixed circuit breaker rated 630 A at 50 °C, with a MicroLogic 2.0 E electronic trip unit providing overload (L) and instantaneous short-circuit (I) protection. It is built to EN/IEC 60947-2 and carries a breaking capacity of 85 kA Icu at 220/240 V AC, 70 kA at 380/415 V, and 65 kA at 440 V — numbers that govern its use as a main or feeder breaker in distribution switchboards where high fault current is expected.
The 630 A trip unit rating at 50 °C sets the continuous current limit; above that ambient, derating applies per IEC 60947-2. The MicroLogic 2.0 E electronic trip unit includes thermal memory (20 minutes), which prevents nuisance tripping on repeated overloads by tracking the conductor temperature. Mechanical durability is rated at 10,000 cycles; electrical durability varies with load: 2,000 cycles at 690 V In, 5,000 at 440 V In. That matters for applications where the breaker is used as a manual disconnect under load.
Dimensions are 327 mm high, 280 mm wide, 147 mm deep — panel builders should verify cutout and clearance for the 4-pole width. IP40 enclosure protection (IK07 impact) suits indoor distribution boards; not rated for washdown.