{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4208-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4208-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4208-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4208-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4208-8 miniature circuit breaker, 2-pole, D-curve, 8 A, 10 kA breaking capacity at 400 VAC, 2 MW units wide.","salesMarkdown":"The Siemens 5SL4208-8 is a SENTRON miniature circuit breaker (MCB) — 2-pole, D-curve, rated 8 A, with a 10 kA breaking capacity at 400 VAC per both EN 60898 and IEC 60947-2. The D-curve (tripping characteristic class D) means the magnetic trip is set to fire between 10x and 20x In — roughly 80 to 160 A instantaneous — which is sized for loads with high inrush, like small transformers, solenoid banks, or motorized valves. At 8 A continuous, it's not a main feeder breaker; it's a branch-circuit protector for equipment that draws modest running current but punches hard on startup. Mounting position is any, which helps in tight enclosures where you're stacking breakers sideways. Sealable terminals are standard, which matters for utility-metering or revenue-grade installations where tamper evidence is required.","metaTitle":"Siemens 5SL4208-8 SENTRON MCB, 2P D 8A 10kA 400V","metaDescription":"Siemens 5SL4208-8 SENTRON miniature circuit breaker, 2-pole, D-curve, 8 A, 10 kA breaking capacity per IEC 60898/60947-2 at 400 VAC. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SL4208-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 2-pole, D, 8A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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":"2","Tripping Characteristic Class":"D","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"10 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":"0.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7404ae85aaaa1f58b9c29459ca8938a8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=433297&mlfb=5SL4208-8"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL4208-8?","answer":"The 5SL4208-8 is rated 10 kA at 400 VAC under both EN 60898 and IEC 60947-2."},{"question":"Where can I buy the 5SL4208-8?","answer":"The 5SL4208-8 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4208-8","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/5SL4208-8 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}}