{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N26500","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N26500","canonicalUrl":"https://aoctrl.com/schneider/A9N26500","factsUrl":"https://aoctrl.com/api/mcp/products/A9N26500","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 iMSU overvoltage release, A9N26500, threshold 255-400V, 230V AC control circuit, 18mm wide, DIN rail mount, EN 50550.","salesMarkdown":"It monitors the control circuit at 230 V AC 50/60 Hz and trips according to a stepped curve: 255-275 V in 3-15 s, 300 V in 1-5 s, 350 V in 0.25-0.75 s, and 400 V in 0.07-0.2 s. That means it catches sustained swells before they damage downstream equipment, while ignoring brief transients that wouldn't harm anything. At 18 mm wide (2 x 9 mm pitches), it occupies a single module slot. Depth is 73.5 mm, height 82.5 mm. Tightening torque is 1 N·m; strip length 9-10 mm. Top-side comb busbar compatible. This part is marked obsolete by the manufacturer. If you're freezing a new design, look at the current Acti9 overvoltage release range; the iMSU form factor and trip characteristics have evolved, so verify the trip curve and DIN footprint against your panel layout. Built to EN 50550, the European standard for power-frequency overvoltage protective devices (POPs). CE marked. The local action indicator gives a visual trip signal, which helps during fault-finding without needing to meter the circuit.","metaTitle":"A9N26500 Acti9 iMSU Overvoltage Release, 255-400V, Obsolete","metaDescription":"Schneider Electric A9N26500 Acti9 iMSU overvoltage release, threshold 255-400V, 230V AC control. Obsolete — sourced to order against RFQ. DIN rail, 18mm wide.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"73.5 mm","Width":"18 mm","Colour":"White","Height":"82.5 mm","Standards":"EN 50550","9 Mm Pitches":"2","Mounting mode":"Fixed","Quality labels":"CE","Tropicalisation":"2","lifecycle_stage":"current","Local signalling":"Action indicator","Mounting support":"35 mm symmetrical DIN rail","Range Of Product":"Acti9","Device short name":"MSU","Relative humidity":"95 % at 55 °C","Tightening torque":"1 N.m bottom","Wire stripping length":"9 mm 10 mm for bottom connection","Connections - terminals":"Screw clamp terminal (bottom) - 2 cable(s) 1.5 mm² - flexible Screw clamp terminal (bottom) - 2 cable(s) 1.5 mm² - flexible with ferrule Screw clamp terminal (bottom) - 1 cable(s) 0.5...2.5 mm² - rigid","Product or component type":"Overvoltage release","Threshold tripping voltage":"255 V 275 V 3...15 s 300 V 1...5 s 350 V 0.25...0.75 s 400 V 0.07...0.2 s","[Uc] control circuit voltage":"230 V AC 50/60 Hz","Ambient air temperature for storage":"-40...85 °C","Ambient air temperature for operation":"-25...50 °C","Comb busbar and distribution block compatibility":"Top: YES"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$108.36 – $114.59","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5af30b796be01acaad9265d1a5ca41a0.pdf","sourceUrl":"https://www.se.com/id/en/product/A9N26500/overvoltage-release-imsu-threshold-255v-to-400v/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N26500/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy A9N26500?","answer":"The A9N26500 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published for this obsolete line."},{"question":"What does the EN 50550 standard mean for this overvoltage release?","answer":"EN 50550 is the European product standard for power-frequency overvoltage protective devices (POPs). It defines the trip accuracy, response times, and safety requirements for devices that protect installations from sustained overvoltages on the mains supply. The A9N26500's stepped trip curve (255-400 V) is designed to meet that standard's coordination requirements."},{"question":"What is the width and depth of A9N26500?","answer":"The A9N26500 is 18 mm wide (2 x 9 mm pitches) and 73.5 mm deep. Height is 82.5 mm. It mounts on 35 mm DIN rail and occupies one standard module slot in a distribution board."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N26500","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/A9N26500 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}}