{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4140-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4140-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4140-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4140-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4140-8CV, 1-pole miniature circuit breaker, D40 characteristic, rated Icu 15 kA at 230/400 V AC.","salesMarkdown":"The Siemens 5SY4140-8CV is a 1-pole miniature circuit breaker (MCB) with a D40 tripping curve and a rated ultimate breaking capacity (Icu) of 15 kA at 230/400 V AC. ## Integration Note The 1-pole width (1 module at 18 mm) fits a compact distribution board or final-sub-distribution panel. The D40 curve at 15 kA Icu coordinates with upstream SENTRON series NH fuse-links or SENTRON 3VL moulded-case breakers for selective tripping; verify the let-through energy (I²t) against the downstream load's withstand rating during panel design.","metaTitle":"5SY4140-8CV MCB, 1P D40, 15kA Icu, 230/400V","metaDescription":"5SY4140-8CV MCB, 1-pole D40 curve, 15kA breaking capacity at 230/400V. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ca392eb960025598458be03eb3409045.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531887&mlfb=5SY4140-8CV","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4140-8CV/alternatives.json"},"ai":{"faq":[{"question":"What is the rated breaking capacity of the 5SY4140-8CV?","answer":"The rated ultimate breaking capacity (Icu) is 15 kA at 230/400 V AC, per the description."},{"question":"Where can I buy the 5SY4140-8CV and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4140-8CV","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SY4140-8CV 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}}