{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839057","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839057","canonicalUrl":"https://aoctrl.com/schneider/LV839057","factsUrl":"https://aoctrl.com/api/mcp/products/LV839057","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Masterpact MTZ3 40 HF, LV839057, switch disconnector, 4000 A, ANSI, 3P, drawout.","salesMarkdown":"The LV839057 is a Masterpact MTZ3 40 HF switch disconnector rated for 4000 A at 104 °F (40 °C) — that's the continuous current it carries without derating in a typical 40 °C ambient panel. The 100 kA Icu at 254 V AC (and 508 V AC, with 85 kA at 635 V AC) tells you the maximum fault current it can safely interrupt once, per ANSI C37.50. That 100 kA figure governs your upstream fault-duty coordination: if your service entrance or switchgear bus can deliver 100 kA symmetrical at 254 V, this breaker holds the line without cascading. The 85 kA Icw for 1.5 seconds (ANSI C37.50) is the short-time withstand — it lets the breaker ride through a delayed trip coordination window, holding closed while downstream devices clear a fault. That matters for selective coordination in a distribution panel: you can set the trip delay long enough to let a feeder breaker clear first, without the main tripping. ## Drawout chassis integration Drawout mounting means the breaker mechanism slides out of its chassis for maintenance or swap without disturbing the line and load connections. The chassis mounts on a support frame, with a connection pitch of 9.06 in (230 mm) between phases. Overall footprint: 31.07 in wide × 18.8 in high × 16.8 in deep (789 × 478 × 427 mm). That depth includes the drawout travel — verify your enclosure depth allows full rack-out clearance before committing the panel layout.","metaTitle":"Schneider Electric LV839057 Masterpact MTZ3 40 HF, 4000A, 3P","metaDescription":"Schneider Electric LV839057 Masterpact MTZ3 40 HF switch disconnector, 4000 A rated current, 100 kA breaking capacity, 3P drawout, ANSI. 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":"LV839057","Height":"18.8 in (478.1 mm)","description":"Automatic, switch disconnector, Masterpact MTZ3, 40 HF, 4000A, ANSI, 3P, drawout","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":"100.0 kA Icu 254 V AC 50/60 Hz with external relay ANSI C37.50 100.0 kA Icu 508 V AC 50/60 Hz with external relay ANSI C37.50 85.0 kA Icu 635 V AC 50/60 Hz with external relay ANSI C37.50","Device short name":"MTZ3 40 HF","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":"85.0 kA 1.5 s ANSI C37.50"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e3bfd38b0cfe9d3fc7b95c4bf02d8412.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839057/automatic-switch-disconnector-masterpact-mtz3-40-hf-4000a-ansi-3p-drawout/"},"ai":{"faq":[{"question":"What is the breaking capacity of LV839057?","answer":"100 kA Icu at 254 V AC 50/60 Hz, 100 kA Icu at 508 V AC, and 85 kA Icu at 635 V AC, all per ANSI C37.50 with external relay. The short-time withstand (Icw) is 85 kA for 1.5 s."},{"question":"Where can I buy LV839057 and how is it quoted?","answer":"The LV839057 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the depth of LV839057?","answer":"The listed depth is 16.8 in (426.8 mm), which includes the drawout mechanism travel. Verify enclosure depth allows full rack-out clearance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839057","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/LV839057 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}}