The Schneider Electric LV839064 is a Masterpact MTZ3 60 HF switch disconnector rated for 6000 A at 104 °F (40 °C), built for distribution applications. It's a 3-pole fixed-mount unit with a push-button control type, designed for AC networks at 50/60 Hz. Breaking capacity hits 100 kA Icu at 254 V and 508 V AC, and 85 kA Icu at 635 V AC — all with an external relay per ANSI C37.50. That's serious fault-interruption headroom for a main distribution breaker in an industrial plant or large commercial building.
Physical footprint: 30.2 in wide, 13.9 in tall, 11.7 in deep. Connection pitch is 9.06 in (230 mm).
Rated operational current of 6000 A at 40 °C ambient — that's the continuous current the main contacts carry without exceeding temperature rise limits. In a real switchboard, that governs the busbar sizing and the ventilation requirement.