{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6663-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6663-6","canonicalUrl":"https://aoctrl.com/siemens/5SL6663-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6663-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6 series, 5SL6663-6 miniature circuit breaker, 63 A, B characteristic, 3P+N, 6 kA per EN 60898.","salesMarkdown":"## 63 A B-curve MCB for residential and infrastructure panels The Siemens 5SL6663-6 is a 4-pole (3P+N) miniature circuit breaker from the SENTRON 5SL6 family, rated 63 A with a B tripping characteristic. Rated for 400 V AC phase-to-phase and 440 V AC maximum in multi-phase operation, with a neutral conductor that is switched (the N pole is not just a solid link). The 63 A rating on a 4-module (72 mm wide) footprint means this breaker fills four width units on a DIN rail — standard for a 3P+N 63 A MCB in European-style panels. That matches the typical SCCR of a domestic consumer unit. If your distribution board's prospective fault current exceeds 6 kA, you need to step up to a higher-rated series (like the Siemens 5SY with 10 kA or 25 kA). The 63 A rating governs the upstream cable sizing — typically 16 mm² or 25 mm² copper, depending on installation method. Terminals accept solid or stranded conductors from 0.75 mm² up to 25 mm², with a tightening torque of 2.5 to 3 N·m. That 25 mm² upper limit is generous for a 63 A breaker — it allows direct connection of the incoming supply cable without a separate terminal adapter. The screw terminals are touch-protected per the product feature. The storage range is wider at -40 to +75 °C. For compliance documentation, the SENTRON 5SL6 series is designed to EN 60898 and IEC 60947-2, with overvoltage category 3 and energy limiting class 3. The product is halogen-free and silicon-free, and is rated IP20 (with connected conductors). Touch protection is built in.","metaTitle":"Siemens 5SL6663-6 SENTRON MCB, 63 A B-Curve 4P 6 kA","metaDescription":"Siemens 5SL6663-6 SENTRON miniature circuit breaker, 63 A rated, B characteristic, 3P+N, 6 kA per EN 60898. Current-production, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 25 mm²","Width":"72 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"5SL miniature circuit breakers","Energy limiting class":"3","Number of width units":"4","Number of poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SL6","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"63 A","Tripping characteristic class":"B","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"6 kA","acc. to IEC 60947-2 / rated value":"6 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Product function / neutral conductor switching":"Yes","with multi-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/02aad1605277fe8d04875233685c53c5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=73202&mlfb=5SL6663-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL6663-6/alternatives.json"},"ai":{"faq":[{"question":"What is 5SL6663-6's listed depth?","answer":"The total depth is 76 mm, with an installation depth of 70 mm behind the panel surface."},{"question":"What conductor sizes does the 5SL6663-6 accept?","answer":"The screw terminals accept solid and stranded conductors from 0.75 mm² up to 25 mm², with a tightening torque of 2.5 to 3 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6663-6","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/5SL6663-6 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}}