{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839309","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839309","canonicalUrl":"https://aoctrl.com/schneider/LV839309","factsUrl":"https://aoctrl.com/api/mcp/products/LV839309","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Masterpact MTZ3 40 HA, LV839309, switch disconnector, 4000 A, 65 kA Icu, 3P, drawout, chassis mount.","salesMarkdown":"The Schneider Electric LV839309 is a Masterpact MTZ3 40 HA automatic switch disconnector, rated 4000 A at 104 °F (40 °C) for distribution duty. It's a 3-pole drawout unit on a chassis mount, controlled via push-button, and built for AC networks at 50/60 Hz. ## Breaking capacity and withstand — the real coordination numbers The LV839309 delivers 65.0 kA Icu at 254 V, 508 V, and 635 V AC (50/60 Hz) with an external relay per ANSI C37.50. That's a flat 65 kA across the common distribution voltages — no derating curve to chase. The rated short-time withstand current [Icw] is also 65.0 kA for 0.5 s per ANSI C37.50, which means it holds through a delayed trip without welding contacts. For a site electrical engineer building a selective coordination study, that Icw match to Icu simplifies the upstream breaker choice — you don't need a bigger gap between the two. The drawout mechanism and chassis mount mean the LV839309 is designed for a fixed switchgear lineup, not a DIN-rail panel. Depth is 16.8 in (426.8 mm), width 31.07 in (789.1 mm), height 18.8 in (478.1 mm). Connection pitch is 9.06 in (230 mm) — verify busbar spacing against your existing switchgear cubicle before committing the footprint. The drawout cradle stays in the cabinet; the breaker element racks in and out for maintenance without disturbing the line and load connections.","metaTitle":"Schneider Electric LV839309 Masterpact MTZ3 40 HA, 4000A, 65","metaDescription":"Schneider Electric LV839309 Masterpact MTZ3 40 HA switch disconnector, 4000A rated, 65kA Icu at 508V AC, 3P drawout, active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Air Circuit Breakers"],"specifications":{"Depth":"16.8 in (426.8 mm)","Width":"31.07 in (789.1 mm)","title":"LV839309","Height":"18.8 in (478.1 mm)","description":"Automatic, switch disconnector, Masterpact MTZ3, 40 HA, 4000A, ANSI, 3P, drawout, ArcBlok","Control Type":"Push-button","Network type":"AC","Mounting Mode":"Drawout","lifecycle_stage":"current","Connection pitch":"9.06 in (230 mm)","Mounting Support":"Chassis","Breaking capacity":"65.0 kA Icu 254 V AC 50/60 Hz with external relay ANSI C37.50 65.0 kA Icu 508 V AC 50/60 Hz with external relay ANSI C37.50 65.0 kA Icu 635 V AC 50/60 Hz with external relay ANSI C37.50","Device short name":"MTZ3 40 HA","Network Frequency":"50/60 Hz","Poles description":"3P","Device Application":"Distribution","Nbr. of units in pkg.":"1","Product or Component Type":"Switch disconnector","[Ie] rated operational current":"4000 A 104 °F (40 °C)","[Icw] rated short-time withstand current":"65.0 kA 0.5 s ANSI C37.50"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e7cc4dbb234799f63db08d5e0dfbe6a7.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839309/automatic-switch-disconnector-masterpact-mtz3-40-ha-4000a-ansi-3p-drawout-arcblok/"},"ai":{"faq":[{"question":"What is the breaking capacity of the LV839309?","answer":"The LV839309 has a breaking capacity of 65.0 kA Icu at 254 V, 508 V, and 635 V AC (50/60 Hz) with an external relay, per ANSI C37.50. Its short-time withstand current [Icw] is also 65.0 kA for 0.5 s."},{"question":"Where can I buy the LV839309?","answer":"The LV839309 is sourced and quoted to order against an RFQ through independent industrial automation distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839309","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/LV839309 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}