{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4405-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4405-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4405-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4405-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY series, MCB, Icu=15kA 400V, 4-pole, D-curve, 0.5 A rated current.","salesMarkdown":"The Siemens 5SY4405-8CV is a 4-pole miniature circuit breaker (MCB) from the 5SY series, rated for 0.5 A with a D tripping characteristic. The 4-pole footprint takes four module widths (roughly 72 mm) in the enclosure — factor that into your panel fill when laying out a distribution board or sub-feed. D-curve characteristic means the magnetic trip threshold is 10–20× In (5–10 A for this 0.5 A unit), so it's sized for loads with high inrush: small transformers, solenoid banks, or control-circuit power supplies where a B-curve would nuisance-trip on start-up.","metaTitle":"Siemens 5SY4405-8CV MCB, 15kA 400V 4P D0.5","metaDescription":"Siemens 5SY4405-8CV miniature circuit breaker, 15kA Icu at 400V, 4-pole D-curve 0.5A. Current lifecycle stage: active. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531615&mlfb=5SY4405-8CV","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4405-8CV/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4405-8CV?","answer":"Icu is 15 kA at 400 V AC — the ultimate short-circuit breaking capacity for this 4-pole D0.5 MCB."},{"question":"Where can I buy the 5SY4405-8CV and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4405-8CV","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/5SY4405-8CV 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}}