{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839026","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839026","canonicalUrl":"https://aoctrl.com/schneider/LV839026","factsUrl":"https://aoctrl.com/api/mcp/products/LV839026","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ3, LV839026, 4000 A rated, 3-pole, fixed-mount circuit breaker, H3 breaking capacity, 100 kA Icu at 508 V AC, 635 V AC max.","salesMarkdown":"The LV839026 is a Schneider Electric MasterPact MTZ3 fixed-mount, 3-pole circuit breaker rated for 4000 A continuous at 40 °C. It carries an H3 breaking capacity code, delivering 100 kA Icu at 254 V AC and 508 V AC, and 85 kA Icu at 635 V AC per ANSI C37.50. ## Ratings that govern the real decision Rated short-time withstand current (Icw) is 85 kA for 0.5 s per ANSI C37.50. Integral instantaneous protection trips between 171 kA and 209 kA, so it clears hard bolted faults fast while letting lower-level overcurrents ride through for the downstream breaker to handle. Mechanical durability is 10,000 cycles; electrical durability is 1,000 cycles under ANSI C37.50. For a 4000 A frame, that electrical endurance is typical for the class — plan your maintenance intervals around it if the breaker sees frequent switching, not just fault protection. Fixed-mount on a base plate with rails. The footprint is 30.2 in wide by 13.9 in tall by 11.7 in deep. Connection pitch is 9.06 in. That's a big frame — verify your enclosure depth and bus bar spacing before committing the cutout. No DIN-rail option on this one; it bolts directly to the panel floor.","metaTitle":"LV839026 MasterPact MTZ3 4000A 3P Fixed Circuit Breaker, 100","metaDescription":"Schneider LV839026 MasterPact MTZ3 circuit breaker, 4000A rated, 3-pole fixed mount, 100 kA Icu at 508 V AC. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Air Circuit Breakers"],"specifications":{"Depth":"11.7 in (297.7 mm)","Width":"30.2 in (767 mm)","title":"LV839026","Height":"13.9 in (352.2 mm)","description":"Circuit breaker, MasterPacT MTZ3, ANSI, max 4000A rated, 3 pole, fixed mount, H3 breaking cap, 635VAC","Control Type":"Push-button","Network type":"AC","Product name":"MasterPact MTZ3","Mounting Mode":"Fixed","lifecycle_stage":"current","Connection pitch":"9.06 in (230 mm)","Mounting Support":"Base plate Rails","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":"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":"10000 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/5020ec97d0a84b617a23c36ef678e092.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839026/circuit-breaker-masterpact-mtz3-ansi-max-4000a-rated-3-pole-fixed-mount-h3-breaking-cap-635vac/"},"ai":{"faq":[{"question":"What are the key breaking capacity ratings for LV839026?","answer":"The LV839026 delivers 100 kA Icu at 254 V AC and 508 V AC, and 85 kA Icu at 635 V AC, all per ANSI C37.50. Its short-time withstand (Icw) is 85 kA for 0.5 s."},{"question":"Where can I buy LV839026 and how is it quoted?","answer":"The LV839026 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the physical size of LV839026?","answer":"The LV839026 measures 30.2 in wide by 13.9 in tall by 11.7 in deep, with a connection pitch of 9.06 in. It is a fixed-mount breaker on a base plate with rails."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839026","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/LV839026 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}