The Schneider Electric LV846205 is a MasterPact MTZ2 4-pole fixed circuit breaker rated 2500 A at 40 °C, built for power distribution protection in industrial switchgear. Category B selectivity (per EN/IEC 60947-2) confirms it coordinates with downstream breakers so only the faulted branch clears.
Rated operational voltage is 440 V AC, with insulation rated 1000 V AC and impulse withstand at 12 kV — this breaker handles standard 400 V class distribution without derating. The Ics (service breaking capacity) matches the Icu at 100 kA for 440 V AC, so you get full rated performance after a fault event, not a reduced service rating. Short-time withstand (Icw) holds 100 kA for 0.5 s and 75 kA for 3 s, giving downstream protection devices time to clear before the main trips.
Fixed-mount design, 537 mm wide × 352 mm high × 300 mm deep. Mounts on rails or a base plate in the switchgear enclosure. Connection pitch is 115 mm; both front and rear connections are available on the upside and downside, giving flexibility for cable or busbar entry. The neutral is on the right side. IP30 protection means it's suitable for indoor panel installation where tools are required to access live parts.
Environmental and operational limits
Altitude rating is 0-2000 m without derating, 2000-5000 m with derating — factor that in for high-altitude installations. Power dissipation is 260 W at rated current, so enclosure cooling needs to account for that heat load.
Durability and mechanical life
Mechanical durability is 15,000 cycles with periodic preventive maintenance. Electrical durability is 5,000 cycles at In under AC-23A (440 V), and 6,000 cycles under AC-3. Maximum breaking time is 25 ms, closing response time 70 ms — fast enough for most distribution protection schemes.