The Schneider Electric LV839202 is a MasterPact MTZ3 drawout circuit breaker, 3-pole, rated 2000 A at 40 °C. It carries the L1F breaking capacity code, delivering 200 kA Icu at 254 V AC and 508 V AC, and 130 kA Icu at 635 V AC per ANSI C37.50. The integral instantaneous protection trips between 49.5 and 55.5 kA. This is a main or feeder breaker for large low-voltage switchgear — sized for a 2000 A bus, not a branch panel.
The L1F breaking capacity (200 kA Icu at 254/508 V, 130 kA at 635 V) tells you the maximum fault current the breaker can safely interrupt; verify your available fault current at the point of installation stays under these thresholds. The short-time withstand (Icw) is 22 kA for 0.5 s — this matters for selective coordination downstream, where the breaker must hold in during a fault long enough for a branch breaker to clear.
Drawout mount with a 4.5-inch (115 mm) connection pitch. The breaker slides into a cassette on base-plate rails — no bolted bus connections to torque. Panel cutout and depth (16.8 in / 426.8 mm) must accommodate the drawout mechanism and ArcBlok arc-chamber. Width is 17.5 in (444.3 mm), height 17.3 in (438.8 mm).