{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839142","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839142","canonicalUrl":"https://aoctrl.com/schneider/LV839142","factsUrl":"https://aoctrl.com/api/mcp/products/LV839142","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ2 series, LV839142, UL 489 circuit breaker, 2000 A rated at 40 °C, 3 pole, drawout mount, H breaking capacity, 600 VAC, without Micrologic trip unit, with ArcBlok.","salesMarkdown":"The LV839142 is a MasterPact MTZ2 drawout air circuit breaker rated 2000 A at 40 °C, 3-pole, with H breaking capacity — 100 kA Icu at 480 V AC per UL 489 and 85 kA at 600 V AC. It ships without a Micrologic trip unit (ordered separately) but includes the ArcBlok arc-flash mitigation technology built into the interrupter. The drawout cradle and base-plate-rail mounting make this a switchgear-cell fit, not a panelboard drop-in. ## Breaking capacity and short-time withstand — the decision numbers The H code on this breaker means 100 kA Icu at 480 V AC and 85 kA at 600 V AC under UL 489. That 100 kA at 480 V is the interrupting rating the breaker can clear once and still be functional — it's not a withstand-then-trip figure. The short-time withstand rating (Icw) is 65 kA for 0.5 s per UL 489, which governs coordination with downstream breakers: if you need selective tripping with a 0.5 s delay window, this breaker will hold that fault current without opening first. The integral instantaneous protection range is 81–99 kA. ## Durability and speed — what the cycle counts tell you Mechanical endurance is 12,500 cycles per ANSI C37.50; electrical endurance under load is 2,800 cycles at rated current. The maximum breaking time is 25–30 ms from trip initiation to arc extinction, and the closing response time is 70 ms max. For a main breaker in a 2000 A switchboard that might see a handful of operations per year, those numbers are academic — but if this is an arc-flash reduction switch or a transfer breaker cycled weekly, the electrical endurance figure governs replacement interval. ## Physical fit — drawout dimensions The drawout chassis measures 17.5 in wide × 17.3 in high × 16.8 in deep (444.3 × 438.8 × 426.8 mm). Connection pitch between phases is 4.5 in (115 mm). The mounting support is base plate rails — typical for a switchgear cell with rear-connected bus. Verify the cell depth clearance; the 16.8 in depth is the breaker alone, not including the cradle rear studs or the arc-chamber exhaust path.","metaTitle":"LV839142 MasterPact MTZ2 2000A 3P Drawout H Break 100kA","metaDescription":"LV839142 MasterPact MTZ2 circuit breaker, 2000A rated at 40°C, 3-pole drawout, H breaking capacity 100kA at 480V 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":"LV839142","Height":"17.3 in (438.8 mm)","description":"Circuit breaker, MasterPacT MTZ2, UL 489, max 2000A 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 20 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":"2000 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":"2000 A","Product or Component Type":"Circuit breaker","Integral instant protection":"81...99 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/520ff066dd99533216e4f42de4fe559e.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839142/circuit-breaker-masterpact-mtz2-ul-489-max-2000a-rated-3-pole-drawout-mount-h-breaking-cap-600vac-w-o-micrologic-trip-unit-w-arcblok/"},"ai":{"faq":[{"question":"Where can I buy LV839142 and what is the lead time?","answer":"The LV839142 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 closest alternative to LV839142 in the MasterPact family?","answer":"Within the MasterPact MTZ2 family, the LV839142 is a specific configuration (2000 A, 3-pole, H breaking capacity, drawout, no trip unit). The closest parametric sibling would share the same frame and breaking code H but differ in rated current or poles. No direct pin-compatible substitute exists because the trip unit is omitted and ordered separately — any alternative would require a different Micrologic selection."},{"question":"What compliance documentation does Schneider provide for LV839142?","answer":"The LV839142 carries UL 489 listing per its spec sheet. RoHS and REACH compliance documentation is standard for Schneider's MasterPact MTZ2 series; the specific declaration can be provided at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839142","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/LV839142 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}}