{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21022","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21022","canonicalUrl":"https://aoctrl.com/schneider/A9N21022","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21022","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Prodis DT40, miniature circuit breaker, 4 A, C-curve, 1P+N, 4.5 kA Icn / 6 kA Icu, DIN rail clip-on, IP20.","salesMarkdown":"The Schneider Electric A9N21022 is a Prodis DT40 miniature circuit breaker rated 4 A with a C-curve trip characteristic (magnetic trip between 5 and 10 times In). The breaking capacity is 4.5 kA Icn at 230 V AC per EN/IEC 60898-1, and 6 kA Icu at 230–240 V AC per IEC 60947-2, so it covers both domestic-distribution and light-industrial panel applications. The tunnel-type terminals accept 0.33–10 mm² flexible or 0.75–16 mm² rigid wire; strip length is 13 mm, tighten to 2 N·m. IP20 finger-safe terminals mean it's suited for enclosed distribution boards or control panels where incidental contact is prevented by the enclosure. Rated for 50 Hz networks, pollution degree 3, overvoltage category IV, and tropicalised per IEC 60068-1 (class 2). Electrical and mechanical durability are both 20,000 cycles. The toggle gives local ON/OFF indication. Separate earth-leakage protection block can be added alongside.","metaTitle":"Schneider Electric A9N21022 Prodis DT40 MCB, 4 A C-Curve 1P+","metaDescription":"Schneider Electric A9N21022 Prodis DT40 MCB, 4 A rated, C-curve, 1P+N, 4.5 kA (Icn) / 6 kA (Icu) breaking capacity, DIN rail mount, IP20. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"78 mm","Range":"Prodis","Width":"18 mm","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60898-1 EN/IEC 60947-2","Curve code":"C","9 Mm Pitches":"2","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":"4500 A Icn at 230 V AC 50 Hz conforming to EN/IEC 60898-1 6 kA Icu at 230...240 V AC 50 Hz conforming to IEC 60947-2","Device short name":"DT40","Network frequency":"50 Hz","Poles description":"1P + N","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"4 A","Overvoltage category":"IV","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":"5...10 x In","Earth-leakage protection":"Separate block","Number of protected poles":"1","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","Ambient air temperature for storage":"-40...70 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"4500 A 100 % x Icn at 230 V AC 50 Hz conforming to EN/IEC 60898-1 4.5 kA 75 % x Icu at 230...240 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/8bfeb94551589ee5f668baf3dbe192bc.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21022/dt40-circuit-breaker-dt40-1p-+-n-4a-c-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21022/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21022","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/A9N21022 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}}