The LV846200 is a MasterPact MTZ2 fixed-mount circuit breaker rated 800 A at 40 °C with a service breaking capacity of 100 kA at 440 V AC. The H2V performance class confirms the 100 kA rating at 415 V AC, so you're covered across the common 400 V class supply voltages. Category B selectivity means the breaker has intentional short-time delay, so it coordinates with downstream devices: a fault on a branch feeder trips the branch breaker first, not this main. That avoids a full panel blackout for a single load fault. The 4-pole design with neutral on the right suits 3-phase + N distribution. Fixed mounting on rails or base plate with front and rear connection options gives flexibility for panel layout — the 115 mm connection pitch matches standard busbar spacing.
IP30 keeps fingers out but expects enclosure protection against water.
Durability and thermal budget
Mechanical durability of 15,000 cycles with periodic preventive maintenance and electrical durability of 10,000 cycles at rated current under AC-23A. Maximum breaking time of 25 ms and closing response time of 70 ms are within typical main-breaker coordination windows.