{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4208-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4208-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4208-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4208-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4208-7, 2-pole miniature circuit breaker, C tripping characteristic, rated breaking capacity 10 kA (EN 60898-1) / 20 kA (IEC 60947-2).","salesMarkdown":"The rated breaking capacity is 10 kA per EN 60898-1 and 20 kA per IEC 60947-2 — the higher figure applies when the breaker is used in industrial distribution per the 60947-2 standard, giving headroom for high-fault installations. Under UL 1077, the interrupting rating is 5 kA, which governs North American supplementary protection applications. The quick-assembly fastening system allows snap-on mounting in any position. Installation depth is 70 mm, with an overall depth of 76 mm — account for this when routing wire behind the DIN rail. IP20 is achieved only with connected conductors — the front terminals are finger-safe, but the busbar area is not sealed against dust ingress. Humidity derating applies: 95% RH up to 55 °C, then 55% RH up to 70 °C, then 35% RH up to 75 °C — a consideration for sealed enclosures or high-humidity washdown areas. Pollution degree 3 means it tolerates conductive pollution in industrial atmospheres. ## Standards and documentation Certified to IEC / EN 60898-1 for residential and commercial MCB applications, and IEC / EN 60947-2 for industrial circuit-breaker duty. For North America, UL 1077 supplementary protection listing is included. The frequency rating is 50/60 Hz. The brand provides RoHS and REACH declarations as standard; UL and CSA documentation are available on request as part of the SENTRON technical file. Energy limitation class 3 indicates the breaker limits let-through energy to a level suitable for protecting downstream components in a coordinated selective system.","metaTitle":"Siemens 5SY4208-7 SENTRON MCB, 2P C-Curve, 10kA IEC, 20kA IE","metaDescription":"Siemens 5SY4208-7 SENTRON miniature circuit breaker, 2-pole, C-curve, 10 kA per EN 60898-1 / 20 kA per IEC 60947-2. Current production. Quoted to order via RFQ.","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 60898-1, IEC / EN 60947-2 / 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":"60 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":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"20 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","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":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","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","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"0.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$25.40","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=437103&mlfb=5SY4208-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4208-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4208-7?","answer":"Rated 10 kA per EN 60898-1 and 20 kA per IEC 60947-2 at 400 V AC. For DC applications, it is rated 15 kA per IEC 60947-2 at 72 V. Under UL 1077, the rating is 5 kA."},{"question":"Will 5SY4208-7 drop into a panel specified for 5SY4304-7CV?","answer":"Both are 2-pole SENTRON MCBs with the same 36 mm width (2 MW) and DIN-rail mounting. The physical footprint is interchangeable. However, 5SY4304-7CV is a B-curve device, while this is a C-curve — verify the tripping characteristic matches the load inrush profile before substituting."},{"question":"How do I get current pricing and availability for 5SY4208-7?","answer":"Submit an RFQ. This part is sourced through independent distribution channels; availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What compliance documentation does Siemens provide for 5SY4208-7?","answer":"The breaker carries IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 certifications. Siemens provides RoHS and REACH declarations; UL and CSA documentation are part of the SENTRON technical file. The part is halogen-free and silicon-free."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4208-7","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/5SY4208-7 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}}