{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21419","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21419","canonicalUrl":"https://aoctrl.com/schneider/A9N21419","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21419","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ProDis DT40N, miniature circuit breaker, D curve, 32 A, 3P+N, 6 kA Icn / 10 kA Icu, DIN rail clip-on, white.","salesMarkdown":"The D curve (magnetic tripping limit 10–14 × In) means it tolerates the high inrush of motor, transformer, or welding loads without nuisance tripping — the breaker holds through the start-up surge and clears only on a sustained overload or hard fault. Clip-on mounting to DIN rail (IP20 finger-safe enclosure) makes it a straight swap into a standard panel layout. 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 circuits with higher prospective fault current. ## Compliance and approvals Dual-certified to EN/IEC 60898-1 and EN/IEC 60947-2, so it qualifies for both residential/commercial distribution boards (60898-1) and industrial switchgear assemblies (60947-2).","metaTitle":"Schneider Electric A9N21419 DT40N MCB, D Curve, 32 A, 3P+N,","metaDescription":"Schneider Electric A9N21419 DT40N miniature circuit breaker, D curve, 32 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":"32 A","Trip unit technology":"Thermal-magnetic","Electrical durability":"10000 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/ce2c6c8b586deee4ab9bbd1bcdaa25df.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21419/dt40-circuit-breaker-dt40n-3p-+-n-32a-d-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21419/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of A9N21419?","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."},{"question":"What does the D curve mean on this breaker?","answer":"The D curve has a magnetic tripping limit of 10–14 × In, so it handles high inrush currents from motors, transformers, and welding equipment without nuisance tripping."},{"question":"Where can I buy A9N21419?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21419","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/A9N21419 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}}