{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL7440-8RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL7440-8RC","canonicalUrl":"https://aoctrl.com/siemens/5SL7440-8RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL7440-8RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SL7440-8RC, miniature circuit breaker, 415 V, 4-pole, 10 kA, D-curve 40 A.","salesMarkdown":"The Siemens 5SL7440-8RC is a 4-pole miniature circuit breaker rated 415 V, 10 kA breaking capacity, with a D-curve trip characteristic set at 40 A. The D-curve means it tolerates the high inrush currents typical of motor and transformer loads, tripping between 10× and 20× rated current for short-circuit protection. The 10 kA interrupting rating at 415 V is the fault current it can safely clear without welding contacts or cascading failure upstream — a key selectivity figure when coordinating with a downstream panel feeder.","metaTitle":"Siemens 5SL7440-8RC MCB, 415V 4-pole 10kA D 40","metaDescription":"Siemens 5SL7440-8RC miniature circuit breaker, 415 V, 4-pole, 10 kA, D-curve 40 A. Current lifecycle stage. Sourced to order against an 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":"https://cdn.aoctrl.com/1dd7c5753805c039e96dcd1212a24cb2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646415&mlfb=5SL7440-8RC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL7440-8RC/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity and curve of 5SL7440-8RC?","answer":"It is a 4-pole miniature circuit breaker rated 415 V, 10 kA breaking capacity, with a D-curve trip characteristic set at 40 A."},{"question":"Where can I buy 5SL7440-8RC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. 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/5SL7440-8RC","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/5SL7440-8RC 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}}