{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839029","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839029","canonicalUrl":"https://aoctrl.com/schneider/LV839029","factsUrl":"https://aoctrl.com/api/mcp/products/LV839029","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ3, LV839029, 4000 A rated, 4-pole drawout, H3 breaking capacity 100 kA Icu at 508 V AC ANSI C37.50, without Micrologic trip unit.","salesMarkdown":"The LV839029 is a MasterPact MTZ3 frame drawout circuit breaker rated 4000 A continuous at 104 °F (40 °C) — that is the full-frame current, not a derated number, so it carries the main bus without a bump. The H3 breaking capacity delivers 100 kA Icu at 508 V AC per ANSI C37.50, meaning it safely interrupts a fault up to that level and recloses without service. For a 635 V AC system the Icu drops to 85 kA, still enough for most industrial secondary-distribution switchgear. The short-time withstand (Icw) is 85 kA for 0.5 s, which is the figure you use for selective coordination with downstream feeders — if your upstream breaker clears in under half a cycle, this frame holds closed and lets the downstream device isolate the fault. Integral instantaneous protection trips between 171 kA and 209 kA — that is the magnetic-only floor, not the adjustable pickup. The 25–30 ms maximum break time and 70 ms maximum closing response time are the mechanism's native speed; they govern arc-flash incident energy calculations for the IEEE 1584 study. Mechanical durability is 12,500 cycles, electrical durability 2,800 cycles per ANSI C37.50 — both are the mechanism's life before major overhaul, not the trip-unit life. ## Drawout mounting and panel fit This is a drawout chassis — the breaker cassette slides into a fixed cradle, so you can rack it out for maintenance without unbolting bus bars. The mounting support is base plate rails; the connection pitch is 9.06 in (230 mm) between phase centers, which is the standard MasterPact MTZ footprint. Panel cutout dimensions: width 40.5 in (1028.7 mm), height 18.8 in (478.1 mm), depth 16.8 in (426.8 mm). No Micrologic trip unit is included — you order the trip unit separately to match your protection curve (LSIG, LSI, or G).","metaTitle":"Schneider LV839029 MasterPact MTZ3 4000A 4P Drawout, 100 kA","metaDescription":"Schneider Electric LV839029 MasterPact MTZ3 circuit breaker, 4000 A rated, 4-pole drawout, H3 breaking capacity 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":"40.5 in (1028.7 mm)","title":"LV839029","Height":"18.8 in (478.1 mm)","description":"Circuit breaker, MasterPacT MTZ3, ANSI, max 4000A rated, 4 pole, drawout mount, H3 breaking cap, 635VAC, w/o Micrologic trip unit","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","Neutral position":"Left","Device short name":"MTZ3 40 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":"4P","Device Application":"Protection","Line Rated Current":"4000 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":"4000 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/8add3685426cf580490913f2037110d0.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839029/circuit-breaker-masterpact-mtz3-ansi-max-4000a-rated-4-pole-drawout-mount-h3-breaking-cap-635vac-w-o-micrologic-trip-unit/"},"ai":{"faq":[{"question":"What breaking capacity does LV839029 provide at 508 V AC?","answer":"100 kA Icu at 508 V AC per ANSI C37.50, with the H3 breaking capacity code. At 635 V AC the Icu is 85 kA, and the short-time withstand (Icw) is 85 kA for 0.5 s."},{"question":"What are the panel cutout dimensions for LV839029?","answer":"Width 40.5 in (1028.7 mm), height 18.8 in (478.1 mm), depth 16.8 in (426.8 mm). The connection pitch between phase centers is 9.06 in (230 mm)."},{"question":"Where can I buy LV839029 and what is the lead time?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for the current lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839029","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/LV839029 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}}