{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839307","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839307","canonicalUrl":"https://aoctrl.com/schneider/LV839307","factsUrl":"https://aoctrl.com/api/mcp/products/LV839307","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ3, LV839307, 3-pole drawout air circuit breaker, 4000 A rated, H2 breaking capacity (85 kA Icu at 508 VAC), without Micrologic trip unit, with ArcBlok.","salesMarkdown":"## What you're specifying The LV839307 is a MasterPact MTZ3 drawout air circuit breaker — 3-pole, 4000 A continuous rating at 40 °C, with H2 breaking capacity delivering 85 kA Icu at 508 VAC (also 85 kA at 254 VAC and 635 VAC per ANSI C37.50). This is the frame and mechanism only: it ships without a Micrologic trip unit, so you'll need to order the protection relay separately. The ArcBlok arc-extinction chamber is integral. Drawout mounting means this breaker slides into a cradle — no hard wiring for the main power connections during swap-out. Rated short-time withstand (Icw) is 85 kA for 0.5 s, which gives you selectivity headroom downstream. Mechanical durability is 5000 cycles; electrical durability 1000 cycles per ANSI C37.50. ## Breaking capacity — what it means for coordination The H2 code tells you the interrupting rating: 85 kA Icu at 254 V, 508 V, and 635 V AC. That's a flat 85 kA across the full ANSI voltage range, not a derated curve. For a 4000 A main breaker feeding a switchboard, that SCCR covers most industrial service-entrance and distribution applications without cascading upstream. Maximum breaking time is 25 to 30 ms; maximum closing response time is 70 ms. The 85 kA Icw for 0.5 s supports delayed tripping for selective coordination with downstream feeders — you can let a fault ride through on the feeder breaker without pulling the main. The drawout chassis measures 31.07 in wide by 18.8 in high by 16.8 in deep, with a connection pitch of 9.06 in (230 mm) between phase centers. Mounting is on base plate rails — this is a floor-mount switchgear frame, not a DIN-rail clip. Verify your cell opening and bus bar spacing before committing the cutout.","metaTitle":"LV839307 MasterPact MTZ3 4000A 3P Drawout Circuit Breaker","metaDescription":"Schneider LV839307 MasterPact MTZ3, 4000A rated, 3P, drawout, 85kA Icu at 508VAC. Active production. Sourced to order against RFQ.","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":"LV839307","Height":"18.8 in (478.1 mm)","description":"Circuit breaker, MasterPacT MTZ3, ANSI, max 4000A rated, 3 pole, drawout mount, H2 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 40 H2","Network Frequency":"50/60 Hz","Performance Level":"85 kA Icu 254 V AC 50/60 Hz ANSI C37.50 85 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":"4000 A 104 °F (40 °C)","Electrical durability":"1000 cycles ANSI C37.50","Maximum breaking time":"25...30 ms","Mechanical durability":"5000 cycles ANSI C37.50","Nbr. of units in pkg.":"1","Breaking capacity code":"H2","Circuit breaker CT rating":"4000 A","Product or Component Type":"Circuit breaker","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/1fe305cabcbe33beb99719abffc3b7b4.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839307/circuit-breaker-masterpact-mtz3-ansi-max-4000a-rated-3-pole-drawout-mount-h2-breaking-cap-635vac-w-o-micrologic-trip-unit-w-arcblok/"},"ai":{"faq":[{"question":"Where can I buy LV839307 and how do I get a price?","answer":"The LV839307 is sourced to order against an RFQ through independent industrial-automation distribution. Submit a request for quote (RFQ) to confirm current pricing and availability — no stock count or firm price is published here."},{"question":"What is the closest pin-compatible alternative to LV839307 in this component family?","answer":"Within the MasterPact MTZ3 family, the closest sibling would be a 4000 A, 3-pole drawout frame with a different breaking capacity code (H1 or H3) or with a factory-installed Micrologic trip unit. The LV839307 is the H2 variant without the trip unit; a version with the trip unit pre-fitted would carry a different order code but share the same mechanical footprint and drawout cradle."},{"question":"What is LV839307's listed depth (16.8 in (426.8 mm)) on this component line?","answer":"The depth is 16.8 in (426.8 mm). This is the overall depth of the drawout chassis, not including the handle or any protruding arc-chamber cover."},{"question":"What is LV839307's listed width (31.07 in (789.1 mm)) on this component line?","answer":"The width is 31.07 in (789.1 mm). This is the overall width of the 3-pole drawout frame, including the side plates."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839307","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/LV839307 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}}