{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4508-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4508-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4508-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4508-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, MCB, Icu=15kA 230/400V, 1P+N, D8 curve, order code 5SY4508-8CV.","salesMarkdown":"The Siemens 5SY4508-8CV is a 1P+N miniature circuit breaker from the SENTRON 5SY series, rated for an ultimate short-circuit breaking capacity (Icu) of 15 kA at 230/400 V AC. The D8 tripping characteristic means it holds through inrush currents 10–20× rated current before opening — sized for motor or transformer branch circuits where the starting surge would nuisance-trip a B- or C-curve breaker. The 1P+N configuration switches the line pole and provides a switched neutral that opens with the line, not a solid neutral bar. 15 kA Icu at 400 V puts this breaker into the high-fault category for a residential or light-commercial panel board. At 230 V the Icu is the same 15 kA, which covers most utility transformer secondary faults in European-style TN systems. The D8 curve is the key selection gate: if the downstream load is resistive or general-purpose, a C-curve sibling would coordinate better; this one is for the branch that sees a motor start or capacitor bank inrush.","metaTitle":"Siemens 5SY4508-8CV MCB, 15kA Icu 230/400V 1P+N D8","metaDescription":"Siemens 5SY4508-8CV MCB, Icu=15kA at 230/400V, 1P+N, D8 curve. Current lifecycle stage. Sourced to order against RFQ — availability confirmed at quote time.","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/e3f56432af46bc3835094aa5b9db2680.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531655&mlfb=5SY4508-8CV","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4508-8CV/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of the 5SY4508-8CV?","answer":"Icu = 15 kA at both 230 V and 400 V AC. That is the ultimate short-circuit breaking capacity — the breaker can safely interrupt a fault up to 15 kA once and remain functional afterward."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4508-8CV","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/5SY4508-8CV 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}}