{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5208-7KK11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5208-7KK11","canonicalUrl":"https://aoctrl.com/siemens/5SY5208-7KK11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5208-7KK11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5208-7KK11, 2-pole miniature circuit breaker, C-curve, 400 V AC / 440 V DC, 10 kA breaking capacity, 2 MW, for railway applications.","salesMarkdown":"## DIN-rail fit and environmental limits The 2-module width (2 MW) means it takes the same slot as a standard double-pole breaker — no surprise when swapping into an existing SENTRON subdistribution board. Ambient temperature range spans -40 °C to +75 °C, with humidity derating above 55 °C: 95% RH at 55 °C, dropping to 35% at 75 °C. That's a railway-grade thermal envelope — it lives in a non-climate-controlled cabinet on a moving vehicle without condensation issues. IP20 with connected conductors — fine inside a closed cabinet; not for wet locations.","metaTitle":"Siemens 5SY5208-7KK11 SENTRON MCB, 2-Pole C-Curve, 400VAC/44","metaDescription":"Siemens 5SY5208-7KK11 SENTRON miniature circuit breaker, 2-pole, C-curve, rated 400VAC/440VDC, 10kA breaking capacity. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC/DC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at DC / rated value":"250 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"universal current","at DC / acc. to EN 60898-2":"10 kA","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","at DC / rated value / maximum":"500 V","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"AC as required, observe DC polarity","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","supply voltage / at DC / rated value":"440 V","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","operational current / at AC / rated value":"8 A","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=472244&mlfb=5SY5208-7KK11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY5208-7KK11/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5208-7KK11","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/5SY5208-7KK11 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}}