{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6663-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6663-7","canonicalUrl":"https://aoctrl.com/siemens/5SL6663-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6663-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6663-7 miniature circuit breaker, 3P+N, C-curve, 63 A, 400 V AC, 6 kA breaking capacity per EN 60898 / IEC 60947-2, 4 MWUs.","salesMarkdown":"## What it is and what it does The Siemens 5SL6663-7 is a SENTRON miniature circuit breaker (MCB) with a 3P+N pole configuration, C-curve tripping characteristic, and a 63 A rated current at 400 V AC. It breaks fault currents up to 6 kA per both EN 60898 and IEC 60947-2, so it's sized for residential and infrastructure branch circuits where the available fault current stays under that threshold. ## What the ratings mean for fit The C-curve (tripping between 5× and 10× In) is the standard choice for general-purpose loads — lighting, socket outlets, small motor circuits — where inrush isn't extreme. At 63 A and 400 V AC, this breaker handles three-phase distribution subfeeds or large single-phase loads on a 3P+N rail. The 6 kA breaking capacity is typical for domestic and light commercial panels; if your fault study shows more than 6 kA at the point of installation, you need a higher-rated device. The 4-module-width footprint (72 mm wide) occupies four 18 mm DIN slots. It's sealable, halogen-free, and silicon-free — useful for installations that require low-corrosion or clean-room material specs. The operating temperature range of -40 °C to 75 °C covers outdoor enclosures in cold climates and warm switchrooms alike. ## Panel integration note Mounts on a DIN rail in any position. The 70 mm installation depth leaves clearance behind the panel door for wiring and supplementary devices (auxiliary contacts, shunt trips, alarm switches) that clip onto the right side. Pollution degree 2 and overvoltage category III suit it for fixed-installation distribution boards.","metaTitle":"Siemens 5SL6663-7 SENTRON MCB, 3P+N, C-Curve, 63 A, 6 kA","metaDescription":"Siemens SENTRON 5SL6663-7 miniature circuit breaker, 3P+N, C-curve, 63 A, 400 V AC, 6 kA breaking capacity per EN 60898. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P+N","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 rated value":"6 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"5.1 W"}},"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=55611&mlfb=5SL6663-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL6663-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SL6663-7?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing."},{"question":"What is the breaking capacity of 5SL6663-7?","answer":"6 kA per EN 60898 and IEC 60947-2 at 400 V AC."},{"question":"What is the difference between 5SL6663-7 and 5SL4363-7?","answer":"The 5SL4363-7 is a 3-pole (3P) version with a 10 kA breaking capacity and 3 MWUs (54 mm wide). The 5SL6663-7 is 3P+N, 6 kA, and 4 MWUs (72 mm wide) — it includes a switched neutral pole. They are not drop-in interchangeable; the panel must be wired for the neutral pole."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6663-7","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/5SL6663-7 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}}