{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N26479","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N26479","canonicalUrl":"https://aoctrl.com/schneider/A9N26479","factsUrl":"https://aoctrl.com/api/mcp/products/A9N26479","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Librio Prodis Acti9 Clario MSU overvoltage release, 255 V trip, 230 V AC 50 Hz control, 18 mm wide, obsolete.","salesMarkdown":"The Schneider Electric A9N26479 is an MSU overvoltage release from the Librio Prodis Acti9 Clario range. It monitors the control circuit voltage and trips when it hits 255 V — a hard threshold, not adjustable. Mounts on 35 mm symmetrical DIN rail, 18 mm wide, 68 mm deep, 82.5 mm tall. White housing, clamp terminals accepting up to 2.5 mm² flexible cable, 9 mm strip length, 1 N·m torque. ## Standards and deployment context Rated to EN/IEC 60947-5-1, the standard for control-circuit devices and switching elements. That covers the overvoltage release's role in a panel: it sits on the DIN rail alongside contactors and relays, protecting downstream control logic from sustained overvoltage on the supply. The 255 V trip point is set for 230 V AC nominal systems where a voltage swell above that threshold could damage PLC inputs or coil-driven devices. Tropicalisation per the same standard, with 95 % humidity tolerance at 55 °C.","metaTitle":"A9N26479 Schneider Electric Overvoltage Release, 255 V, Obso","metaDescription":"Schneider Electric A9N26479 MSU overvoltage release, 255 V trip threshold, 230 V AC control. Obsolete — sourced to order against RFQ via independent channels.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"68 mm","Width":"18 mm","Colour":"White","Height":"82.5 mm","Standards":"EN/IEC 60947-5-1","9 Mm Pitches":"2","Mounting mode":"Fixed","Tropicalisation":"2 conforming to EN/IEC 60947-5-1","lifecycle_stage":"current","Local signalling":"Action indicator","Mounting support":"35 mm symmetrical DIN rail","Range Of Product":"Librio Prodis Acti9 Clario","Device short name":"MSU","Relative humidity":"95 % at 55 °C","Tightening torque":"1 N.m","Wire stripping length":"9 mm","Connections - terminals":"Clamp terminal - 1 cable(s) 2.5 mm² - flexible","Product or component type":"Overvoltage release","Threshold tripping voltage":"255 V","[Uc] control circuit voltage":"230 V AC 50 Hz","Ambient air temperature for storage":"-40...85 °C","Ambient air temperature for operation":"-25...50 °C"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/252130a59f3265a6f88845d78f5ce841.pdf","sourceUrl":"https://www.se.com/sg/en/product/A9N26479/voltage-release-msu-255vaac-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N26479/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy A9N26479 and how do I get a price?","answer":"We source the A9N26479 to order against an RFQ through our independent distribution network. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the trip voltage of the A9N26479 overvoltage release?","answer":"The A9N26479 trips at a fixed threshold of 255 V. It is designed for a 230 V AC 50 Hz control circuit."},{"question":"What standards does the A9N26479 comply with?","answer":"It complies with EN/IEC 60947-5-1, the standard for control-circuit devices. It also meets tropicalisation requirements per the same standard."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N26479","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/A9N26479 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}}