The LV846184 is a fixed-mount, 4-pole MasterPact MTZ2 air circuit breaker from Schneider Electric, built for power distribution protection in industrial and commercial switchboards. It's a Category B breaker — meaning it's fully selective with downstream devices, so a fault on a branch won't take the whole main bus down. Rated 2000 A at 40 °C ambient, with a sensor range covering 1000 A, 1250 A, 1600 A, and 2000 A, so you can dial in the protection setting to match the load without swapping hardware.
This H2V performance variant delivers 100 kA Icu (ultimate breaking capacity) at 415 V AC, and the same 100 kA Ics (service breaking capacity) at both 220/415 V and 440 V AC — meaning after clearing a fault at its full rating, the breaker is still fit to carry rated current and be reclosed. Short-time withstand (Icw) is 100 kA for 1 second, 75 kA for 3 seconds — critical for selective coordination with downstream feeders.
Standards and physical fit
IP30 front face protection. Dimensions: 537 mm wide, 352 mm high, 300 mm deep. Fixed mounting on rails or base plate. Both front and rear connection options on the upside and downside. Neutral pole on the left.
Durability and environment
Mechanical endurance is 15,000 cycles with periodic preventive maintenance. Electrical durability at rated current: 8,000 cycles at 440 V AC under AC-23A (motor switching), 6,000 cycles under AC-3 (high-frequency motor starting). Maximum breaking time is 25 ms, closing response time 70 ms. Power dissipation at rated current is 250 W — plan for ventilation in the enclosure. Altitude derating above 2000 m.