{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21395","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21395","canonicalUrl":"https://aoctrl.com/schneider/A9N21395","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21395","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ProDis DT40N miniature circuit breaker, A9N21395, 3-pole 10 A, D curve, 6 kA Icn / 10 kA Icu at 400 V AC, clip-on DIN rail.","salesMarkdown":"Three poles protected, thermal-magnetic trip, and it carries both EN/IEC 60898-1 and EN/IEC 60947-2 certifications, meaning it's rated for both household-style and industrial branch-circuit duty. The D curve means the magnetic trip fires at 10 to 14 times rated current — 100 to 140 A for this 10 A breaker. The 6 kA Icn (per EN/IEC 60898-1) is the service breaking capacity for general distribution; the 10 kA Icu (per IEC 60947-2) is the ultimate breaking capacity for industrial panels, so this breaker can interrupt a fault up to 10 kA at 400 V AC without failing. ## Integration notes Tunnel-type terminals accept 0.33 to 10 mm² flexible or 0.75 to 16 mm² rigid wire; strip length 13 mm, tighten to 2 N.m. The toggle gives local ON/OFF indication. If you need earth-leakage protection, a separate residual-current block can be added downstream.","metaTitle":"Schneider Electric A9N21395 DT40N MCB, 3P 10A D Curve, 6kA/1","metaDescription":"Schneider Electric A9N21395 DT40N miniature circuit breaker, 3-pole 10A D curve, 6kA Icn / 10kA Icu at 400V AC. Clip-on DIN rail. Active production. Quoted 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","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","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"10 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":"440 V AC 50 Hz","[Ue] rated operational voltage":"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/a6851d10626f1214b8c0c69cbcccbcc4.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21395/dt40-circuit-breaker-dt40n-3p-10a-d-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21395/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy A9N21395 and get a price?","answer":"A9N21395 is sourced and quoted 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."},{"question":"What is the breaking capacity of A9N21395?","answer":"6 kA Icn at 400 V AC per EN/IEC 60898-1, and 10 kA Icu at 400...415 V AC per IEC 60947-2. The higher figure applies in industrial branch-circuit applications."},{"question":"What does the D curve mean on this breaker?","answer":"The magnetic trip operates at 10 to 14 times the rated current (100–140 A for the 10 A version). That's designed for loads with high inrush current — motors, transformers, welding equipment — without nuisance tripping."},{"question":"What compliance documentation does Schneider provide for A9N21395?","answer":"The breaker carries EN/IEC 60898-1 and EN/IEC 60947-2 certifications, NF quality label, and tropicalisation class 2 per IEC 60068-1. It is suitable for isolation per IEC 60947-2. RoHS and REACH declarations are standard for the ProDis range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21395","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/A9N21395 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}}