{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839238","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839238","canonicalUrl":"https://aoctrl.com/schneider/LV839238","factsUrl":"https://aoctrl.com/api/mcp/products/LV839238","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ, MX opening voltage release, 380/480 V AC/DC, drawout mounting, 50 ms response time.","salesMarkdown":"The Schneider Electric LV839238 is an MX opening voltage release — a shunt trip coil — designed for MasterPact MTZ drawout circuit breakers. It sits inside the breaker's control compartment and, when energized, mechanically trips the breaker open. The drawout mounting means it installs into the breaker cradle, not the fixed panel wiring, so it travels with the breaker cassette during racking. That dual AC/DC rating simplifies panel design — one coil covers both supply types without a separate rectifier. The tripping threshold is 0.7 to 1.1 times the nominal control voltage, so on a 480 V system the coil will reliably trip anywhere from 336 V to 528 V. Holding power is 4.5 VA or 4.5 W, a modest draw that a standard control transformer can supply. ## Response time and application context The response time is 50 ms ± 10 % across the MTZ1, MTZ2, and MTZ3 frame sizes. That 50 ms window is the time from energizing the coil to the breaker contacts starting to open — fast enough for emergency-stop and shunt-trip functions where you need the breaker open before a downstream fault can escalate. In a drawout cradle, the coil's wiring connects through the breaker's secondary disconnects, so the control circuit stays intact during racking.","metaTitle":"Schneider LV839238 MX Opening Coil, 380/480 V AC/DC, for MTZ","metaDescription":"LV839238 MX opening voltage release for MasterPact MTZ drawout breakers. 380/480 V AC/DC control circuit. Obsolete — sourced to order against RFQ. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Air Circuit Breakers"],"specifications":{"Mounting Mode":"Drawout","Response time":"50 ms +/- 10 % MasterPact MTZ1 50 ms +/- 10 % MasterPact MTZ2 50 ms +/- 10 % MasterPact MTZ3","lifecycle_stage":"current","Device short name":"MX","Device Application":"Control","Supply holding power":"4.5 VA 4.5 W","Voltage release type":"Opening coil","Nbr. of units in pkg.":"1","Product or Component Type":"Voltage release","Threshold tripping voltage":"0.7...1.1 Un","[Uc] control circuit voltage":"380/480 V AC 50/60 Hz 380/480 V DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5a1d34d00eba016a299bbc912bfefab7.pdf","sourceUrl":"https://www.se.com/ca/en/product/LV839238/mx-opening-voltage-release-380-480-v-ac-dc-for-mtz-drawout/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LV839238/alternatives.json"},"ai":{"faq":[{"question":"What is LV839238's listed mounting mode?","answer":"Drawout mounting — the coil installs into the MasterPact MTZ breaker cradle, not the fixed panel wiring."},{"question":"What is the response time of LV839238?","answer":"50 ms ± 10 % across MTZ1, MTZ2, and MTZ3 frames."},{"question":"Where can I buy LV839238?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839238","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/LV839238 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}