{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV839269","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV839269","canonicalUrl":"https://aoctrl.com/schneider/LV839269","factsUrl":"https://aoctrl.com/api/mcp/products/LV839269","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric LV839269 MN diagnostic undervoltage release, 380/480 V AC/DC, drawout mount, for MasterPact MTZ drawout circuit breakers.","salesMarkdown":"The Schneider Electric LV839269 is an MN diagnostic undervoltage release designed for MasterPact MTZ drawout circuit breakers. It operates on a 380/480 V AC 50/60 Hz or 380/480 V DC control circuit, with a threshold tripping voltage of 0.35 to 0.7 Un on opening and 0.85 Un on closing. The device is classified as a communicating control type with a drawout mounting mode, and it serves a safety device application by signaling an error when the coil is powered and the MN is open. The 380/480 V AC/DC control circuit voltage covers common industrial supply voltages across both AC and DC systems, so the release works in panels fed from a 400 V three-phase line or a 380 V DC bus. The threshold tripping voltage of 0.35 to 0.7 Un on opening means the release will drop out and signal a fault when the control voltage falls below roughly 133 V (at 380 V nominal) to 336 V (at 480 V nominal), protecting downstream equipment from undervoltage conditions. The 4.5 VA / 4.5 W holding power is low enough that the control transformer sizing is rarely a constraint — standard 50 VA control transformers handle multiple such releases without issue. ## Deployment Context As a drawout-mounted undervoltage release for MasterPact MTZ breakers, this part is installed in the breaker's accessory compartment and wired to the control circuit. The drawout form factor means it can be inserted or removed without powering down the main bus — useful for retrofit or maintenance on live switchgear. The safety device application (signaling an error when the coil is powered and the MN is open) makes it part of the breaker's undervoltage protection scheme, typically used in motor control centers or distribution panels where a voltage dip must trip the main breaker and alert the control system.","metaTitle":"Schneider Electric LV839269 MN Diagnostic Undervoltage Relea","metaDescription":"Schneider Electric LV839269 MN diagnostic undervoltage release for MasterPact MTZ drawout. 380/480 V AC/DC control circuit. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Air Circuit Breakers"],"specifications":{"Control Type":"Communicating","Mounting Mode":"Drawout","Response time":"40 ms +/- 5 % MasterPact MTZ1 90 ms +/- 5 % MasterPact MTZ2 90 ms +/- 5 % MasterPact MTZ3","lifecycle_stage":"current","Device short name":"MN diag","Device Application":"Safety","Signalling function":"Error Coil powered MN open","Supply holding power":"4.5 VA 4.5 W","Voltage release type":"Undervoltage release","Nbr. of units in pkg.":"1","Product or Component Type":"Voltage release","Threshold tripping voltage":"0.35...0.7 Un on opening 0.85 Un on closing","[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/99444a77ccbe9a483c23e7bc2bc629a1.pdf","sourceUrl":"https://www.se.com/ca/en/product/LV839269/mn-diagnostic-undervoltage-release-200-250-v-ac-dc-for-mtz-drawout/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LV839269/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for LV839269?","answer":"Pricing and availability are confirmed at quote time against an RFQ through independent distribution. Submit an RFQ for the LV839269 to receive current market pricing and stock status — no stock figures or lead-time numbers are published for this obsolete part."},{"question":"What is the closest alternative to LV839269 in this component family?","answer":"No official successor order code is listed for the LV839269. For a replacement, consult the MasterPact MTZ accessory catalog for the current-generation undervoltage release that matches your control voltage and drawout configuration. The manufacturer's documentation for the MTZ series lists compatible accessories by function and voltage."},{"question":"What is LV839269's listed control type?","answer":"The LV839269 is listed as a communicating control type, meaning it interfaces with the breaker's communication network for status and diagnostic signals."},{"question":"What is LV839269's listed mounting mode?","answer":"The LV839269 uses a drawout mounting mode, allowing it to be inserted or removed from the breaker's accessory compartment without de-energizing the main bus."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV839269","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/LV839269 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}}