The LV839067 is a Masterpact MTZ3 60 HF automatic switch disconnector rated 6000 A at 104 °F (40 °C), 4-pole, drawout chassis mount, for AC distribution networks at 50/60 Hz. Breaking capacity reaches 100 kA Icu at 254 V AC and 508 V AC, and 85 kA Icu at 635 V AC — all with an external relay per ANSI C37.50. That means it clears a fault up to 100 kA without the arc flashing over, which is the selectivity headroom a site electrical engineer needs for coordination studies on a large switchboard. The drawout cradle lets you rack the breaker out for maintenance or swap without disturbing the bus connections — a field-service tech can isolate and replace this in minutes, not hours.
Physical footprint and integration
Width is 40.5 in (1028.7 mm), depth 16.8 in (426.8 mm), height 18.8 in (478.1 mm). Connection pitch is 9.06 in (230 mm). That is a large-frame breaker — plan the enclosure gland plate and bus-bar takeoff accordingly. Mounts on a chassis with drawout mechanism; the panel OEM wireman needs to account for the racking clearance in front of the cubicle.