{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839143","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839143","canonicalUrl":"https://aoctrl.com/schneider/LV839143","factsUrl":"https://aoctrl.com/api/mcp/products/LV839143","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ2 series, LV839143, UL 489 circuit breaker, 2500 A rated, 3-pole, drawout mount, H breaking capacity, 600 VAC, without Micrologic trip unit, with ArcBlok.","salesMarkdown":"The LV839143 is a Schneider Electric MasterPact MTZ2 drawout circuit breaker, UL 489 listed, rated 2500 A continuous at 104 °F (40 °C) on a 600 VAC network, 50/60 Hz. Three-pole, H breaking capacity code — meaning 100 kA Icu at 240 VAC, 100 kA Icu at 480 VAC, and 85 kA Icu at 600 VAC per UL 489. This is the frame without a Micrologic trip unit; the ArcBlok arc-extinction system is integral. Drawout mounting on base plate rails (connection pitch 115 mm) means the breaker slides into a fixed cradle — the cassette stays wired while the breaker is racked out for isolation or swap. Panel builders spec this for main or tie positions where service continuity matters: rack the breaker to test/disconnect position without pulling the bus. ## Breaking performance and coordination Rated breaking and making capacity is 90 kA. Short-time withstand (Icw) is 65 kA for 0.5 s per UL 489 — that is the current the breaker can carry closed during a delayed trip, critical for selective coordination downstream. Integral instantaneous protection triggers between 135 and 165 kA; maximum breaking time is 25 to 30 ms, closing response within 70 ms. Mechanical durability is 12,500 cycles, electrical durability 2,800 cycles per ANSI C37.50. For a main breaker at 2500 A, that electrical endurance covers years of normal switching; the mechanical figure matters for racking and test operations. Product status is Active per Schneider's current lifecycle record. This is not a phase-out or last-time-buy line — the MasterPact MTZ2 series is the current-generation UL 489 platform for high-current distribution. ## Physical integration into the switchboard Dimensions: width 17.5 in (444.3 mm), height 17.3 in (438.8 mm), depth 16.8 in (426.8 mm). The drawout cradle adds depth behind the mounting plate; verify the enclosure depth against the racked-in dimension plus clearance for the arc-chamber exhaust. Base plate rails support the assembly — no DIN-rail mounting on this class of breaker.","metaTitle":"Schneider LV839143 MasterPact MTZ2 2500A 3P Drawout Circuit","metaDescription":"Schneider MasterPact MTZ2 LV839143 circuit breaker, 2500A rated, 3-pole, drawout mount, H breaking capacity, 600VAC UL 489. Active production. Quoted 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":"17.5 in (444.3 mm)","title":"LV839143","Height":"17.3 in (438.8 mm)","description":"Circuit breaker, MasterPacT MTZ2, UL 489, max 2500A rated, 3 pole, drawout mount, H breaking cap, 600VAC, w/o Micrologic trip unit, w/ ArcBlok","Control Type":"Push-button","Network type":"AC","Product name":"MasterPact MTZ2","Mounting Mode":"Drawout","lifecycle_stage":"current","Connection pitch":"4.5 in (115 mm)","Mounting Support":"Base plate Rails","Device short name":"MTZ2 25 H","Network Frequency":"50/60 Hz","Performance Level":"100 kA Icu 240 V AC 50/60 Hz UL 489 100 kA Icu 480 V AC 50/60 Hz UL 489 85 kA Icu 600 V AC 50/60 Hz UL 489","Poles description":"3P","Device Application":"Protection","Line Rated Current":"2500 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":"H","Circuit breaker CT rating":"2500 A","Product or Component Type":"Circuit breaker","Integral instant protection":"135...165 kA","Maximum closing response time":"70 ms","Rated breaking and making capacity":"90 kA","[Icw] rated short-time withstand current":"65 kA 0.5 s UL 489"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/76c905a4421d9876ac77679e02de2229.pdf","sourceUrl":"https://www.se.com/ca/en/product/LV839143/circuit-breaker-masterpact-mtz2-ul-489-max-2500a-rated-3-pole-drawout-mount-h-breaking-cap-600vac-w-o-micrologic-trip-unit-w-arcblok/"},"ai":{"faq":[{"question":"What compliance documentation does Schneider provide for LV839143?","answer":"The LV839143 carries a UL 489 listing, as stated in the product description. ANSI C37.50 endurance data is published. RoHS and REACH compliance declarations are standard for Schneider's MasterPact MTZ2 series; the specific declaration for this order code is available on request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839143","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/LV839143 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}}