{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21394","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21394","canonicalUrl":"https://aoctrl.com/schneider/A9N21394","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21394","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ProDis DT40N miniature circuit breaker, A9N21394, D curve, 6 A rated, 3 poles, 6 kA Icn / 10 kA Icu, clip-on DIN rail mount.","salesMarkdown":"## What the D curve and 6 A rating mean for your panel The A9N21394 is a Schneider Electric ProDis DT40N miniature circuit breaker with a D tripping curve, rated 6 A, 3 poles, and a breaking capacity of 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 D curve magnetic trip fires at 10 to 14 x In. The 3-pole body takes 6 modules of 9 mm pitch (54 mm wide). Tunnel-type terminals accept 0.33 to 10 mm² flexible or 0.75 to 16 mm² rigid upstream and downstream; strip length is 13 mm, tighten to 2 N.m. IP20 finger-safe front. The toggle gives local ON/OFF indication. If you need earth-leakage protection, a separate RCCB or RCBO block is required — this breaker is thermal-magnetic only. NF quality label and dual EN/IEC standards cover most European and many international installations.","metaTitle":"Schneider Electric A9N21394 DT40N MCB, D Curve 6 A 3P, 6/10","metaDescription":"Schneider Electric A9N21394 DT40N miniature circuit breaker, D curve, 6 A, 3 poles, 6 kA Icn / 10 kA Icu. Active production, sourced to order. Request RFQ for pricing and availabil","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":"6 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/6f7562dbda842b3ad79ad9f5f12feec1.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21394/dt40-circuit-breaker-dt40n-3p-6a-d-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21394/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21394","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/A9N21394 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}}