{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6663-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6663-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SL6663-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6663-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SL6663-8CC, Basic Devices series, miniature circuit breaker, 63 A D-curve, 3+N-pole, 400 V, 6 kA.","salesMarkdown":"The Siemens 5SL6663-8CC is a 3+N-pole miniature circuit breaker rated 63 A with a D tripping curve, 400 V, and a 6 kA breaking capacity. It sits in the Basic Devices family — the workhorse MCB line for DIN-rail panels where you need a D-curve to handle high inrush loads like motor starters or transformer primaries without nuisance tripping on the magnetizing surge. RoHS compliant since 01-06-13, with REACH candidate-list disclosure available on request. The D-curve (10-20x In) is the key spec for procurement: it's sized for loads that slam the breaker with a short inrush — think motor contactor coils, solenoid banks, or control transformers. A C-curve would trip on that first surge; the D holds through it. Three poles plus a switched neutral (3+N) means you get full isolation on all four conductors — useful where you need to lock out the neutral for safe downstream work. The 3+N package takes four module widths — plan your enclosure fill accordingly. Spring-cage or screw terminals accept 0.75–25 mm² conductors depending on the terminal variant on this specific order code; verify the termination type on the nameplate before wiring.","metaTitle":"Siemens 5SL6663-8CC Miniature Circuit Breaker, 63 A D-Curve","metaDescription":"Siemens 5SL6663-8CC miniature circuit breaker, 63 A, D-curve, 3+N-pole, 400 V, 6 kA breaking capacity. Active production. RoHS compliant. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Group Code":"P310","Product Group":"3821","Product class":"B: return restricted, please contact your Siemens partner/contact","Quantity Unit":"1 Piece","Product Family":"Basic Devices","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : N","Packaging dimensions (L x W x H)":"Not available","Compliance with the substance restrictions according to RoHS directive":"Since: 01-06-13","REACH Art. 33 Duty to inform according to the current list of candidates":"Reach Information"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/02aad1605277fe8d04875233685c53c5.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/5SL6663-8CC?tree=CatalogTree","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL6663-8CC/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6663-8CC","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/5SL6663-8CC 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}}