{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21417","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21417","canonicalUrl":"https://aoctrl.com/schneider/A9N21417","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21417","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Prodis DT40N miniature circuit breaker, A9N21417, D curve 20 A, 3P+N, 6 kA Icn / 10 kA Icu, DIN rail clip-on.","salesMarkdown":"The 20 A continuous rating handles distribution circuits up to that load. Breaking capacity is dual-rated: 6 kA Icn at 400 V AC per EN/IEC 60898-1 for general distribution, and 10 kA Icu at 400–415 V AC per IEC 60947-2 for industrial panel duty. Thermal-magnetic trip technology combines a bimetal element for overload protection (time-delayed) with a solenoid for short-circuit protection (instantaneous). ## Where it goes in the panel Clip-on mounting to DIN rail, 6 module pitches (9 mm each = 54 mm wide). Tunnel terminals accept 0.33–10 mm² flexible or 0.75–16 mm² rigid copper, with a 2 N·m tightening torque and 13 mm strip length — typical for panel-builder wiring practice.","metaTitle":"Schneider Electric A9N21417 Prodis DT40 MCB, D Curve 20 A 3P","metaDescription":"Schneider Electric A9N21417 Prodis DT40 miniature circuit breaker, D curve 20 A, 3P+N, 6 kA Icn / 10 kA Icu, DIN rail mount. Active production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"78 mm","Range":"Prodis","Width":"54 mm","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60898-1 EN/IEC 60947-2","Curve code":"D","9 Mm Pitches":"6","Control type":"Toggle","Network type":"AC","Product name":"DT40","Mounting mode":"Clip-on","Quality labels":"NF","Tropicalisation":"2 conforming to IEC 60068-1","lifecycle_stage":"current","Limitation class":"3 conforming to EN/IEC 60898-1","Local signalling":"ON/OFF indication","Mounting support":"DIN rail","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60947-2","Range of product":"ProDis","Breaking capacity":"6000 A Icn at 400 V AC 50 Hz conforming to EN/IEC 60898-1 10 kA Icu at 400...415 V AC 50 Hz conforming to IEC 60947-2","Device short name":"DT40N","Network frequency":"50 Hz","Poles description":"3P + N","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"20 A","Trip unit technology":"Thermal-magnetic","Electrical durability":"20000 cycles","Mechanical durability":"20000 cycles","Wire stripping length":"13 mm","Connections - terminals":"Tunnel type terminals downstream 0.33...10 mm² flexible Tunnel type terminals downstream 0.75...16 mm² rigid Tunnel type terminals upstream 0.33...10 mm² flexible Tunnel type terminals upstream 0.75...16 mm² rigid","IP degree of protection":"IP20 conforming to IEC 60529","Magnetic tripping limit":"10...14 x In","Earth-leakage protection":"Separate block","Number of protected poles":"3","Product or component type":"Miniature circuit-breaker","Suitability for isolation":"Yes","Contact position indicator":"Yes","Locking options description":"Padlocking device","[Ui] rated insulation voltage":"400 V AC 50 Hz","[Ue] rated operational voltage":"230 V AC 50 Hz between phase and neutral 400 V AC 50 Hz between phases","Ambient air temperature for storage":"-40...70 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"6000 A 100 % x Icn at 400 V AC 50 Hz conforming to EN/IEC 60898-1 7.5 kA 75 % x Icu at 400 V AC 50 Hz conforming to IEC 60947-2","[Uimp] rated impulse withstand voltage":"4 kV conforming to IEC 60947-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/de2657cacfb74bd723c2b94c17fd916a.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21417/dt40-circuit-breaker-dt40n-3p-+-n-20a-d-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21417/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of A9N21417?","answer":"It carries dual ratings: 6 kA Icn at 400 V AC per EN/IEC 60898-1 for residential and commercial distribution, and 10 kA Icu at 400–415 V AC per IEC 60947-2 for industrial panel applications."},{"question":"What wire sizes does A9N21417 accept?","answer":"Tunnel terminals accept 0.33–10 mm² flexible or 0.75–16 mm² rigid copper on both upstream and downstream sides. Strip length is 13 mm, torque to 2 N·m."},{"question":"Where can I buy A9N21417 and get current pricing?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21417","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/A9N21417 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}}