{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839239","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839239","canonicalUrl":"https://aoctrl.com/schneider/LV839239","factsUrl":"https://aoctrl.com/api/mcp/products/LV839239","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric, MasterPact MTZ, voltage release, LV839239, MX 2nd opening coil, 12 V DC, drawout mounting, 50 ms response.","salesMarkdown":"The Schneider LV839239 is an MX 2nd opening voltage release for MasterPact MTZ drawout breakers — a control accessory that trips the breaker on loss or application of control voltage. It's the second MX coil position, meaning the breaker already carries one MX; this one adds a separate shunt-trip path for a second independent signal (e.g., remote emergency stop or undervoltage protection from a different source). Rated for 12 V DC control with a 50 ms response time across all three MTZ frame sizes. Holding power is 4.5 W / 4.5 VA, and the trip threshold sits at 0.7...1.1 Un. Schneider has marked the LV839239 as Obsolete. That means factory production has ended — no new-build units are coming off the line. For a BOM that calls out this exact order code, the only channel is the independent surplus and last-time-buy market. Drawout mounting means this coil is designed for the MasterPact MTZ drawout cradle — it plugs into the secondary disconnect block, not a fixed-mounted breaker. If your installation uses a fixed MTZ (non-drawout), this part won't physically connect. The 50 ms response is the time from voltage removal to contact opening; it's consistent across all three MTZ frame sizes, so the same coil works in an MTZ1 panelboard or an MTZ3 switchgear lineup. The 12 V DC control circuit is the coil's operating voltage — verify your control transformer or DC supply delivers 12 V DC nominal. The 0.7...1.1 Un threshold means the coil drops out (trips the breaker) when the control voltage falls below about 8.4 V DC, and it resets (re-energizes) above about 13.2 V DC. That's a standard undervoltage-release characteristic, not a shunt trip that fires on a pulse.","metaTitle":"Schneider LV839239 MX 2nd Opening Voltage Release, 12 V DC,","metaDescription":"Obsolete MX 2nd opening voltage release for MasterPact MTZ drawout breakers. 12 V DC control, 50 ms response. Sourced to order against RFQ — confirm availability at quote.","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":"second MX","Device Application":"Control","Supply holding power":"4.5 W 4.5 VA","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":"12 V DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/15017bc6f1856359638bd02faeb2f5be.pdf","sourceUrl":"https://www.se.com/us/en/product/LV839239/mx-2nd-opening-voltage-release-12-v-dc-for-mtz-drawout/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LV839239/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy LV839239 and get a price?","answer":"We source the LV839239 to order against an RFQ through independent distribution. Submit a quote request; availability and current pricing are confirmed at quote time."},{"question":"What is the LV839239's mounting mode?","answer":"Drawout — designed for the MasterPact MTZ drawout cradle, not fixed-mounted breakers."},{"question":"What is the LV839239's response time?","answer":"50 ms ±10% across all MasterPact MTZ frame sizes — MTZ1, MTZ2, and MTZ3."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839239","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/LV839239 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}}