{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C40K42D250","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C40K42D250","canonicalUrl":"https://aoctrl.com/schneider/C40K42D250","factsUrl":"https://aoctrl.com/api/mcp/products/C40K42D250","rawCanonicalId":null},"summary":{"shortDescription":"Circuit breaker, ComPacT NSX400K, 36kA/800VAC, 10kA/1000VAC, 4 poles, MicroLogic 2.3 trip unit, 250A","salesMarkdown":null,"metaTitle":null,"metaDescription":null,"metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Range":"ComPacT","Depth (D)":"110 mm","Standards":"EN/IEC 60947","Width (W)":"185 mm","Height (H)":"255 mm","Control type":"Toggle","Network type":"AC","Product weight":"7.9 kg","Thermal memory":"20 minutes before and after tripping","Trip unit name":"MicroLogic 2.3","Number of poles":"4P","Protection type":"L : for overload protection (long time) So : for short time short-circuit protection with fixed delay I : for instantaneous short-circuit protection","lifecycle_stage":"current","Connection pitch":"45 mm","Local signalling":"Flashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload","Mounting support":"Backplate","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60664-1","Range of product":"ComPact NSX400...630","Trip unit rating":"250 A at 40 °C","Device short name":"ComPacT NSX400K","Network frequency":"50/60 Hz","Performance level":"K 10 kA 1000 V AC","Relative humidity":"0...95 %","Upside connection":"Front","Device application":"Special application","Operating altitude":"0...2000 m without derating 2000 m...5000 m with derating","[In] rated current":"250 A at 40 °C","Downside connection":"Front","Trip unit technology":"Electronic","Utilisation category":"Category A","Electrical durability":"1000 cycles at 1000 V In","Mechanical durability":"15000 cycles","IK degree of protection":"IK07 conforming to IEC 62262","IP degree of protection":"IP40 conforming to IEC 60529","Earth-leakage protection":"Without","Product or component type":"Circuit breaker","Suitability for isolation":"Yes conforming to EN/IEC 60947-2","Neutral protection settings":"0.5 x Ir (3t + N/2) 1 x Ir (4t) No protection (3t)","Protected poles description":"3t 3t + N/2 4t","Circuit breaker mounting mode":"Fixed","[Ui] rated insulation voltage":"1000 V AC 50/60 Hz","Trip unit protection functions":"LSoI","[Ue] rated operational voltage":"800...1000 V AC 50/60 Hz","Zone selective interlocking ZSI":"Without","Electrical shock protection class":"Class II","Ambient air temperature for storage":"-50...85 °C","Ambient air temperature for operation":"-25...70 °C","[Uimp] rated impulse withstand voltage":"8 kV","Number of slots for electrical auxiliaries":"6 slot(s)","Long-time protection delay adjustment type tr":"Fixed","Short-time protection delay adjustment type tsd":"Fixed","[Tr] Long-Time Protection Delay Adjustment Range":"11 s at 7.2 x Ir 16 s at 6 x Ir 400 s at 1.5 x Ir","Short-time protection pick-up adjustment type Isd":"Adjustable 9 settings","[Ir] long-time protection pick-up adjustment range":"70...250 A","Instantaneous protection pick-up adjustment type Ii":"Fixed","[Ics] rated service short-circuit breaking capacity":"10 kA at 800 V AC 50/60 Hz conforming to IEC 60947-2 10 kA at 1000 V AC 50/60 Hz conforming to IEC 60947-2","[Icu] rated ultimate short-circuit breaking capacity":"36 kA Icu at 800 V AC 50/60 Hz conforming to IEC 60947-2 10 kA Icu at 1000 V AC 50/60 Hz conforming to IEC 60947-2","[Isd] Short-time protection pick-up adjustment range":"1.5...10 x Ir","[Ii] instantaneous protection pick-up adjustment range":"3000 A","Long-time pick-up adjustment type Ir (thermal protection)":"Adjustable 9 settings"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/26bfc4deb8b78c790ca4b26350c50934.pdf","sourceUrl":"https://www.se.com/au/en/product/C40K42D250/circuit-breaker-compact-nsx400k-36ka-800vac-10ka-1000vac-4-poles-micrologic-2-3-trip-unit-250a/","alternativesUrl":"https://aoctrl.com/api/mcp/products/C40K42D250/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C40K42D250","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/C40K42D250 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}