{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839077","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839077","canonicalUrl":"https://aoctrl.com/schneider/LV839077","factsUrl":"https://aoctrl.com/api/mcp/products/LV839077","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ3, LV839077, 3-pole drawout air circuit breaker, 4000 A rated at 40 °C, breaking capacity to 200 kA Icu at 254 V AC, without Micrologic trip unit.","salesMarkdown":"The LV839077 is a MasterPact MTZ3 drawout air circuit breaker, 3-pole, rated 4000 A continuous at 40 °C. It ships without a Micrologic trip unit — the buyer selects the protection relay separately. The frame carries an breaking capacity code, which means 200 kA Icu at 254 V AC 60 Hz per ANSI C37.50, 150 kA at 508 V, and 100 kA at 635 V. That is the fault-clearing ceiling; the actual interrupting rating depends on the installed trip unit and system voltage. This is a main or large-feeder breaker for ANSI-style switchgear — not a panelboard or MCC bucket device. The drawout cradle lets you rack the breaker between connected, test, and disconnected positions without pulling cables, which is standard for maintenance and arc-flash mitigation in industrial and data-center distribution. The 100 kA Icw for 0.5 s (ANSI C37.50) is the short-time withstand — the breaker can carry 100 kA symmetrical for half a second while downstream breakers clear a fault. That is the number that governs selective coordination: if your upstream transformer or generator can deliver 100 kA, this frame holds long enough for the feeder breaker to open. The integral instantaneous protection is set at 243–297 kA, which is an arc-flash mitigation band — it clears bolted faults in under 9 ms (the listed maximum break time) before the short-time delay expires. Mechanical endurance is 10,000 cycles, electrical endurance 1,000 cycles under rated load per ANSI C37.50. For a main breaker that operates a few times a year, that is effectively life-of-installation. For a generator or process breaker that cycles weekly, track the count.","metaTitle":"Schneider Electric LV839077 MasterPact MTZ3 4000A 3P Drawout","metaDescription":"Schneider Electric LV839077 MasterPact MTZ3 circuit breaker, 4000 A at 40 °C, 3-pole drawout, L1 breaking capacity to 200 kA Icu at 254 V AC. Active production, quoted to order. Re","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":"17.5 in (444.3 mm)","title":"LV839077","Height":"17.3 in (438.8 mm)","description":"Circuit breaker, MasterPacT MTZ3, ANSI, max 4000A rated, 3 pole, drawout mount, L1 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","Device short name":"MTZ3 40 L1","Network Frequency":"50/60 Hz","Performance Level":"200 kA Icu 254 V AC 60 Hz ANSI C37.50 200 kA Icu 508 V AC 60 Hz ANSI C37.50 130 kA Icu 635 V AC 60 Hz ANSI C37.50 200 kA Icu 254 V AC 50 Hz ANSI C37.50 150 kA Icu 508 V AC 50 Hz ANSI C37.50 100 kA Icu 635 V AC 50 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":"9 ms","Mechanical durability":"10000 cycles ANSI C37.50","Nbr. of units in pkg.":"1","Breaking capacity code":"L1","Circuit breaker CT rating":"4000 A","Product or Component Type":"Circuit breaker","Integral instant protection":"243...297 kA","Maximum closing response time":"70 ms","Rated breaking and making capacity":"90 kA","[Icw] rated short-time withstand current":"100 kA 0.5 s ANSI C37.50"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/71733e739b4b28a7fc69c194832e5662.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839077/circuit-breaker-masterpact-mtz3-ansi-max-4000a-rated-3-pole-drawout-mount-l1-breaking-cap-635vac-w-o-micrologic-trip-unit/"},"ai":{"faq":[{"question":"Does LV839077 include a trip unit?","answer":"No. The LV839077 is the frame and cradle only — it ships without a Micrologic trip unit. The buyer selects the protection relay separately based on the required curve, communication, and metering functions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839077","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/LV839077 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}}