{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N26979","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N26979","canonicalUrl":"https://aoctrl.com/schneider/A9N26979","factsUrl":"https://aoctrl.com/api/mcp/products/A9N26979","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Librio Prodis Acti9 Clario series, MSU overvoltage release, A9N26979, 275 V threshold, 230 V AC 50 Hz control circuit, 35 mm DIN rail mount, white.","salesMarkdown":"The A9N26979 is a Schneider Electric MSU overvoltage release from the Librio Prodis Acti9 Clario range. It trips when the control circuit voltage exceeds 275 V, protecting downstream equipment from sustained overvoltage conditions on a 230 V AC 50 Hz supply. This part is obsolete per the manufacturer's lifecycle status. Fixed mounting on 35 mm DIN rail. Clamp terminals accept one flexible cable up to 2.5 mm²; strip 9 mm, torque to 1 N·m. The white housing carries a local action indicator for visual trip confirmation. Ambient operating range -25 to 50 °C, storage -40 to 85 °C, with 95% RH at 55 °C. Designed to EN/IEC 60947-5-1, the standard for control circuit devices and switching elements. Tropicalisation treatment per that same standard for humid environments. The 275 V threshold tripping voltage is the key selection parameter — confirm it matches your system's overvoltage protection coordination.","metaTitle":"A9N26979 Overvoltage Release MSU 275V, Obsolete","metaDescription":"Schneider Electric A9N26979 MSU overvoltage release, 275 V threshold, 230 V AC control. Obsolete — sourced to order against RFQ. DIN rail mount, EN/IEC 60947-5-1.","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":"275 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/5b745cc5777ff022548b14b65a26ad12.pdf","sourceUrl":"https://www.se.com/id/en/product/A9N26979/voltage-release-msu-275vaac-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N26979/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy A9N26979?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."},{"question":"What is the tripping voltage for A9N26979?","answer":"The overvoltage release trips at a threshold of 275 V on the control circuit."},{"question":"What standard does A9N26979 comply with?","answer":"It complies with EN/IEC 60947-5-1, the standard for control circuit devices and switching elements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N26979","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/A9N26979 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}}