{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839305","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839305","canonicalUrl":"https://aoctrl.com/schneider/LV839305","factsUrl":"https://aoctrl.com/api/mcp/products/LV839305","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Masterpact MTZ3 40 HB, LV839305, automatic switch disconnector, 4000 A rated operational current, 3-pole, drawout, ArcBlok.","salesMarkdown":"The LV839305 is a Masterpact MTZ3 40 HB automatic switch disconnector rated 4000 A at 104 °F (40 °C) — that is the continuous current it carries without derating in a typical 40 °C ambient. For a main or tie breaker on a 4000 A bus, this is the frame size that matches the bus rating, not a derated step-down. Breaking capacity is 200 kA Icu at 240 V AC, 150 kA at 480 V, and 100 kA at 600 V per UL 489. Integral instant protection is rated 170 kA, meaning the magnetic trip element handles that level of short-circuit current without relying on the electronic trip unit alone. This is a selectivity and arc-flash coordination parameter — the breaker clears fast enough to let downstream devices ride through. ## Drawout construction and panel integration Drawout mounting means the breaker chassis stays bolted to the switchboard frame while the moving portion racks in and out. For a 4000 A main, this is the standard for maintenance isolation — you rack the breaker to the test or disconnected position without unbolting power cables. Chassis-mount support and a connection pitch of 9.06 in (230 mm) define the bus-bar centers and the cutout in the switchboard floor. Width 31.07 in, height 18.8 in, depth 16.8 in. Verify switchboard compartment depth before specifying.","metaTitle":"LV839305 Masterpact MTZ3 40 HB, 4000 A, 3P Drawout","metaDescription":"LV839305 Masterpact MTZ3 switch disconnector, 4000 A rated, 200 kA Icu at 240 V, 3-pole drawout. Active production, sourced to order. Request quote.","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":"LV839305","Height":"18.8 in (478.1 mm)","description":"Automatic, switch disconnector, Masterpact MTZ3, 40 HB, 4000A, UL, 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":"200.0 kA Icu 240 V AC 50/60 Hz UL 489 150.0 kA Icu 480 V AC 50/60 Hz UL 489 100.0 kA Icu 600 V AC 50/60 Hz UL 489","Device short name":"MTZ3 40 HB","Network Frequency":"50/60 Hz","Poles description":"3P","Device Application":"Distribution","Nbr. of units in pkg.":"1","Product or Component Type":"Switch disconnector","Integral instant protection":"170.0 kA","[Ie] rated operational current":"4000 A 104 °F (40 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/43c958a5f41705200f15c88d54b4f0e8.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839305/automatic-switch-disconnector-masterpact-mtz3-40-hb-4000a-ul-3p-drawout-arcblok/"},"ai":{"faq":[{"question":"What is the breaking capacity of LV839305?","answer":"200 kA Icu at 240 V AC, 150 kA at 480 V, and 100 kA at 600 V, all per UL 489. Integral instant protection is rated 170 kA."},{"question":"What are the physical dimensions of LV839305?","answer":"Width 31.07 in (789.1 mm), height 18.8 in (478.1 mm), depth 16.8 in (426.8 mm). Connection pitch is 9.06 in (230 mm)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839305","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/LV839305 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}}