{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6463-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6463-6","canonicalUrl":"https://aoctrl.com/siemens/5SL6463-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6463-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6463-6 miniature circuit breaker, 4-pole, B-curve, 63 A, 6 kA breaking capacity per EN 60898, 400 V AC, 4 MW units, IP20 with connected conductors.","salesMarkdown":"The Siemens 5SL6463-6 is a SENTRON miniature circuit breaker — 4-pole, B-curve, rated 63 A at 400 V AC with a 6 kA breaking capacity per EN 60898 (also 6 kA per IEC 60947-2). Four poles (4P) switch all lines simultaneously, making it a full-disconnect device for three-phase plus neutral circuits. The 5SL6463-6 occupies 4 modular width units (72 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. Halogen-free and silicon-free construction matters in clean-room or high-reliability environments where outgassing can contaminate contacts or optics. ## What the B-curve and breaking capacity mean in practice The B-curve (tripping characteristic class B) is the most sensitive of the common curves — it trips magnetically at 3–5× In, so a 63 A breaker will hold 189 A to 315 A for a few milliseconds before instant-trip. That makes it suitable for circuits with low inrush: resistive loads, small control transformers, lighting banks. For motor circuits or high-inrush loads, a C- or D-curve would be more appropriate. The 6 kA breaking capacity (EN 60898) and 6 kA (IEC 60947-2) are identical here — this breaker is rated for residential and light-commercial infrastructure (per its suitability listing). The 400 V AC rated voltage (440 V max multi-phase) covers standard three-phase distribution in most regions.","metaTitle":"Siemens 5SL6463-6 SENTRON MCB, 4P B 63A 6kA 400V","metaDescription":"Siemens 5SL6463-6 SENTRON miniature circuit breaker, 4-pole, B-curve, 63 A, 6 kA per EN 60898, 400 V AC. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SL6463-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 4-pole, B, 63 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","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":"B","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":"5.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3b57e28b16ea199b053ea494d6244378.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=476244&mlfb=5SL6463-6"},"ai":{"faq":[{"question":"What is the difference between 5SL6463-6 and 5SL4363-7?","answer":"The 5SL4363-7 is a 3-pole, C-curve breaker rated 63 A at 400 V with a 10 kA breaking capacity (EN 60898). The 5SL6463-6 is 4-pole, B-curve, 6 kA. The pole count and curve are the deciding factors — the 5SL6463-6 switches all four lines (3-phase + N) and trips faster on overload, while the 5SL4363-7 handles higher fault current and is better for moderate-inrush loads. They are not drop-in substitutes without rewiring."},{"question":"Where can I buy 5SL6463-6?","answer":"The 5SL6463-6 is sourced to order through independent distribution. Submit an RFQ for current pricing and availability — the part is quoted on request, not listed with a fixed stock count."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6463-6","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/5SL6463-6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}