630 A fixed-mount breaker for main distribution
The Schneider Electric LV847115 is a MasterPact MTZ1 fixed circuit breaker rated 630 A at 40 °C, 4 poles, with H1 performance level delivering 42 kA Ics at 415 V AC. Category B selectivity means it coordinates with downstream breakers to isolate faults without blacking out the entire bus. The 42 kA Ics holds across the full voltage range up to 690 V AC — no derating curve to watch at higher voltages. Rated insulation voltage is 1000 V AC, impulse withstand 12 kV, and the breaker meets EN/IEC 60947-2 including Annex H for power distribution protection.
Fixed-mount design — no draw-out cradle. Mounts on rails or base plate with a 70 mm connection pitch. Front and rear connection options on both upside and downside give flexibility for busbar or cable entry. Neutral position is left, standard for 4-pole distribution panels. Dimensions: 346 mm wide, 301 mm high, 209 mm deep. IP30 enclosure protection — suitable for enclosed switchboards, not open outdoor mounting.
Breaking performance and durability
Rated service breaking capacity (Ics) is 42 kA at every standard voltage: 220/415 V, 440 V, 500/525 V, and 660/690 V AC. Short-time withstand (Icw) holds 42 kA for 0.5 s or 1 s, 24 kA for 3 s — useful for selective coordination with downstream feeders. Making capacity (Icm) reaches 88 kA peak across the same voltage range. Mechanical durability is 12,500 cycles with periodic preventive maintenance. Electrical durability varies by voltage and duty: 3,000 cycles at 690 V AC, 6,000 cycles at 440 V AC under AC-23A or AC-3 conditions. Maximum breaking time 25 ms, closing response 50 ms.