{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839312","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839312","canonicalUrl":"https://aoctrl.com/schneider/LV839312","factsUrl":"https://aoctrl.com/api/mcp/products/LV839312","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ3, LV839312, 3-pole drawout circuit breaker, 5000 A at 40 °C, H3 breaking capacity to 100 kA Icu at 508 V AC, without Micrologic trip unit, with ArcBlok.","salesMarkdown":"The Schneider Electric LV839312 is a MasterPact MTZ3 drawout circuit breaker, 3-pole, rated 5000 A at 104 °F (40 °C), with an H3 breaking capacity code. It is designed for ANSI C37.50 applications and delivers 100 kA Icu at 508 V AC, 85 kA Icu at 635 V AC. The unit ships without a Micrologic trip unit and includes ArcBlok arc-flash mitigation technology. This is a protection device for large industrial and utility power distribution — sized for main or tie breaker duty in switchgear where continuous current demands hit 5000 A. The drawout cradle lets you rack the breaker out for maintenance without de-energizing the bus. ## Breaking capacity and withstand — what the H3 rating means for your coordination study The H3 breaking capacity code on this MTZ3 means it can interrupt 100 kA Icu at 254 V AC and 508 V AC, and 85 kA Icu at 635 V AC per ANSI C37.50. Rated short-time withstand current (Icw) is 85 kA for 0.5 s per ANSI C37.50. The integral instant protection range is 171 to 209 kA, meaning the magnetic trip element responds to bolted faults above that threshold within the breaker's 25 to 30 ms maximum breaking time. Rated breaking and making capacity is 170 kA — this is the breaker's ability to close onto and immediately interrupt a fault, a key parameter for generator paralleling and capacitor bank switching where closing into a charged circuit is possible. ## Physical integration into switchgear Drawout mount with base plate rails — the breaker chassis slides into a fixed cradle that bolts into the switchgear enclosure. Connection pitch is 9.06 in (230 mm) between phase centers, matching standard ANSI switchgear bus spacing. Overall dimensions: 31.07 in (789.1 mm) wide, 18.8 in (478.1 mm) high, 16.8 in (426.8 mm) deep. Verify the cell opening in your existing gear against these before ordering. The breaker operates on AC control power at 50/60 Hz. Mechanical durability is rated at 12,500 cycles, electrical durability at 2,800 cycles per ANSI C37.50 — the electrical figure governs for load-break applications; expect contact inspection at that interval.","metaTitle":"Schneider LV839312 MasterPact MTZ3 Circuit Breaker, 5000 A,","metaDescription":"Schneider LV839312 MasterPact MTZ3 circuit breaker, 5000 A rated, 3-pole, drawout mount, H3 breaking capacity to 100 kA Icu at 508 V AC. Active production. Sourced 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":"LV839312","Height":"18.8 in (478.1 mm)","description":"Circuit breaker, MasterPacT MTZ3, ANSI, max 5000A rated, 3 pole, drawout mount, H3 breaking cap, 635VAC, w/o Micrologic trip unit, w/ ArcBlok","Control Type":"Push-button","Network type":"AC","Product name":"MasterPact MTZ3","Mounting Mode":"Drawout","lifecycle_stage":"current","Connection pitch":"9.06 in (230 mm)","Mounting Support":"Base plate Rails","Device short name":"MTZ3 50 H3","Network Frequency":"50/60 Hz","Performance Level":"100 kA Icu 254 V AC 50/60 Hz ANSI C37.50 100 kA Icu 508 V AC 50/60 Hz ANSI C37.50 85 kA Icu 635 V AC 50/60 Hz ANSI C37.50","Poles description":"3P","Device Application":"Protection","Line Rated Current":"5000 A 104 °F (40 °C)","Electrical durability":"2800 cycles ANSI C37.50","Maximum breaking time":"25...30 ms","Mechanical durability":"12500 cycles ANSI C37.50","Nbr. of units in pkg.":"1","Breaking capacity code":"H3","Circuit breaker CT rating":"5000 A","Product or Component Type":"Circuit breaker","Integral instant protection":"171...209 kA","Maximum closing response time":"70 ms","Rated breaking and making capacity":"170 kA","[Icw] rated short-time withstand current":"85 kA 0.5 s ANSI C37.50"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a4d1d799d51803419372775639cf92c7.pdf","sourceUrl":"https://www.se.com/ca/en/product/LV839312/circuit-breaker-masterpact-mtz3-ansi-max-5000a-rated-3-pole-drawout-mount-h3-breaking-cap-635vac-w-o-micrologic-trip-unit-w-arcblok/"},"ai":{"faq":[{"question":"What is the closest alternative to LV839312 in the MasterPact MTZ3 family?","answer":"Within the MasterPact MTZ3 family, the closest alternative would be a different breaking capacity variant (H1, H2, or) or a version with an integrated Micrologic trip unit. The LV839312 is the H3, 5000 A, 3-pole, drawout, no-trip-unit configuration — any substitution requires re-evaluating the coordination study and trip curve settings."},{"question":"What are the key dimensions of LV839312 for switchgear fit?","answer":"Width is 31.07 in (789.1 mm), height is 18.8 in (478.1 mm), depth is 16.8 in (426.8 mm). Connection pitch between phase centers is 9.06 in (230 mm). Mounting is drawout with base plate rails."},{"question":"What compliance documentation does Schneider provide for LV839312?","answer":"The LV839312 is designed and tested to ANSI C37.50 standards. It carries UL and CSA listings as part of the MasterPact MTZ3 platform. For specific RoHS/REACH declarations, refer to Schneider Electric's product environmental profile available through their documentation portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839312","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/LV839312 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}}