The LV839165 is a Schneider Electric MasterPact MTZ2 circuit breaker rated 1600 A continuous at 104 °F (40 °C), 3-pole, in a drawout mounting frame. The LF breaking capacity code delivers 200 kA Icu at 240 V AC, 150 kA Icu at 480 V AC, and 100 kA Icu at 600 V AC under UL 489 — so it interrupts faults up to those levels without cascading upstream. The integral instantaneous protection trips between 49.5 and 55.5 kA, and the short-time withstand rating (Icw) is 22 kA for 0.5 s per UL 489, which governs coordination with downstream breakers during a delayed trip. Drawout mounting means the breaker chassis stays bolted to the base plate rails, and the removable cradle slides in and out for maintenance or swap without disturbing the bus connections — standard for switchgear lineups where uptime drives the design. The 4.5 in (115 mm) connection pitch matches the MasterPact MTZ2 bus-bar pattern, so it lands into an existing MTZ2 switchgear section without re-drilling. Mechanical endurance is 10,000 cycles per ANSI C37.50; electrical endurance is 1,000 cycles under load at rated current.
The drawout cradle mounts on base plate rails inside the switchgear enclosure. Overall dimensions are 17.5 in wide × 17.3 in high × 16.8 in deep (444.3 × 438.8 × 426.8 mm) — verify the cell opening in your existing lineup matches these before ordering. The 4.5 in connection pitch aligns with the standard MTZ2 bus riser; no adapter kit needed for a Schneider MasterPact switchboard.