The C063H360FM is a 3-pole fixed-mount ComPacT NS new generation MCCB rated 630 A at 50 °C with a MicroLogic 6.0 electronic trip unit. The trip unit provides L (long-time overload), S (short-time short-circuit), I (instantaneous short-circuit), and G (ground-fault) protection — the G function is built into the trip unit logic, though the breaker ships without earth-leakage relay hardware (without). Breaking capacity is the headline: 85 kA Icu at 240 V AC, 70 kA at 415 V, 65 kA at 440 V, 50 kA at 500/525 V, and 42 kA at 690 V. For a 630 A main breaker on a 2000 kVA transformer at 415 V, that 70 kA covers the prospective fault current without cascading upstream. The breaker is manually operated (no motor mechanism), fixed-mounted to a backplate, with front-front connection (line and load both front). Connection pitch is 70 mm. IP40 enclosure protection and IK07 impact resistance — suitable for indoor panel installation where occasional tool contact is expected, not washdown.
Standards compliance: EN/IEC 60947-2 (Category B), suitability for isolation per the same standard.
Durability and deployment context
Mechanical durability is 10,000 cycles; electrical durability varies with load: 2000 cycles at 690 V at full In, 4000 cycles at 690 V at In/2, 5000 cycles at 440 V at In, 6000 cycles at 440 V at In/2. For a main breaker that operates infrequently (once per shift or less), that is ample. For a switching duty application (frequent load disconnect), the electrical endurance at 440 V In/2 (6000 cycles) is the limiting figure. Thermal memory is 20 minutes — after a trip, the MicroLogic 6.0 remembers the thermal state for 20 minutes, so a reclose before that window sees a shorter time-to-trip on the next overload. This matters for motor starting or inrush-heavy loads where successive starts could nuisance-trip without the memory reset. Operating altitude: 0–2000 m no derating; 2000–5000 m with derating. Relative humidity 0–95%. Power losses are 10 W at rated current — negligible for panel thermal budgeting.