{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL7404-8RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL7404-8RC","canonicalUrl":"https://aoctrl.com/siemens/5SL7404-8RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL7404-8RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SL7 series, Miniature circuit breaker, 415 V 4-pole 15 kA D 4, 5SL7404-8RC.","salesMarkdown":"The Siemens 5SL7404-8RC is a 4-pole miniature circuit breaker (MCB) rated for 415 V AC with a 15 kA breaking capacity and a D tripping characteristic for a 4 A rated current. That is a utility-grade interrupting rating — it belongs in a panel where the transformer and upstream feeder can deliver that kind of fault energy, not in a light commercial board where 6 kA or 10 kA would suffice. The 4-pole construction (all poles switched, neutral switched as well) means it is intended for a three-phase four-wire system where you need to isolate all live conductors. The D 4 characteristic: 4 A continuous rating, with the magnetic trip set to operate between 40 A and 80 A. That is deliberately high, so a motor starting transient of 6–8× FLA will not clear the breaker on start-up provided the fault loop impedance keeps the current below the instantaneous threshold. This is a DIN-rail-mount MCB, 4-pole wide, occupying four modular units (each 17.5 mm or 18 mm depending on the standard). The D 4 characteristic means the thermal bimetal element is sized for 4 A continuous; if the ambient temperature inside the enclosure exceeds 40 °C, derating applies per the IEC 60898-1 thermal correction table — typically about 0.8–0.9× for a 50 °C enclosure. The 15 kA breaking capacity is unconditional at 415 V; no need for a current-limiting upstream device to achieve that rating, which simplifies coordination in a sub-distribution board.","metaTitle":"Siemens 5SL7404-8RC Miniature Circuit Breaker, 415V 4P 15kA","metaDescription":"Siemens 5SL7404-8RC miniature circuit breaker, 415 V, 4-pole, 15 kA breaking capacity, D 4 characteristic. Current lifecycle stage. Available 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=646399&mlfb=5SL7404-8RC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL7404-8RC/alternatives.json"},"ai":{"faq":[{"question":"What is 5SL7404-8RC used for?","answer":"It is a 4-pole miniature circuit breaker with a D 4 characteristic, rated 415 V and 15 kA breaking capacity, typically used to protect motor feeder circuits and other inductive loads where high inrush current is expected."},{"question":"Where can I buy 5SL7404-8RC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL7404-8RC","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/5SL7404-8RC 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}}