{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5208-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5208-6","canonicalUrl":"https://aoctrl.com/siemens/5SY5208-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5208-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5208-6, 2-pole miniature circuit breaker, B-curve, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC / 440 V DC, 2 MW.","salesMarkdown":"It is not the right curve for motor circuits or high-inrush capacitive loads; those call for C or D curves. The higher figure under 60947-2 matters when the part is specified for industrial panel duty where fault current at the bus can exceed 10 kA — the 15 kA rating gives headroom without needing an upstream current-limiting device. Rated for both AC and DC operation: 400 V AC (multi-phase or single-phase) and 440 V DC, with a maximum DC operating voltage of 500 V. The DC rating follows EN 60898-2, so it is verified for DC fault interruption — not all MCBs carry a certified DC rating. Sealable terminals are provided, allowing the installer to lock the cover after commissioning. Halogen-free and silicon-free construction, which matters for clean-room or semiconductor-adjacent installations where outgassing must be minimized. The part carries dual certification: IEC/EN 60898-2 for residential and commercial use, and UL 1077 for North American supplementary protection applications.","metaTitle":"Siemens 5SY5208-6 SENTRON MCB, 2P B-Curve, 10kA, 400V AC","metaDescription":"Siemens 5SY5208-6 SENTRON miniature circuit breaker, 2-pole, B-curve, 10 kA per EN 60898, 15 kA per IEC 60947-2. 400 V AC / 440 V DC. Current lifecycle. 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","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-2, UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"440 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"universal current","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"B","at DC according to EN 60898-2":"10 kA","according to EN 60898 rated value":"10 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage Of The Operating Voltage":"AC/DC","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"500 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","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":"1.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b301c74b08585fa68044a46c1e886b2e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1385699&mlfb=5SY5208-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY5208-6/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY5208-6?","answer":"10 kA per EN 60898 and 15 kA per IEC 60947-2. The higher 60947-2 rating applies when the MCB is used in industrial panel applications where fault current can exceed 10 kA."},{"question":"Will 5SY5208-6 drop into a panel specified for 5SY5240-7?","answer":"Both are 2-pole SENTRON MCBs on the same DIN-rail footprint (2 MW, 36 mm wide). The physical fit is identical, but the trip curve and rating differ — verify the B-curve and current rating match your circuit requirements before substituting."},{"question":"What compliance documentation is available for 5SY5208-6?","answer":"The MCB is certified to IEC/EN 60898-2 and UL 1077. It is halogen-free and silicon-free. Standard RoHS and REACH declarations are available from the manufacturer."},{"question":"How do I get current pricing and availability for 5SY5208-6?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5208-6","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/5SY5208-6 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}}