Switch disconnector for distribution — 5000 A continuous, 65 kA interrupting
The Schneider Electric LV839001 is a Masterpact MTZ3 50 HA non-automatic switch disconnector rated for 5000 A continuous at 40 °C ambient — sized for main incoming feeders or large bus-tie applications in ANSI distribution systems. Breaking capacity reaches 65 kA Icu at 254 V, 508 V, and 635 V AC 50/60 Hz when used with an external relay per ANSI C37.50, giving the specifying engineer coordination headroom across common distribution voltages without derating the interrupting rating. Short-time withstand current is 85 kA for 0.5 s (Icw per ANSI C37.50), which supports selective coordination downstream — the switch holds closed through a fault long enough for a branch breaker to clear, keeping upstream service alive.
Fixed-mount, three-pole, AC network — panel integration notes
Fixed-mount three-pole (3P) construction, footprint 30.2 in wide × 13.9 in tall × 11.7 in deep (767 × 352.2 × 297.7 mm), with a connection pitch of 9.06 in (230 mm) between phases — verify bus-bar drilling and enclosure depth before laying out the switchgear lineup. Push-button control type on the front fascia; network type is AC only — no DC ratings are listed, so this unit is intended for 50/60 Hz AC distribution, not DC bus or variable-frequency output switching. Device application is Distribution, meaning it is designed for main or tie switching where isolation and overcurrent protection are handled by upstream or external devices.