{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8210-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8210-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8210-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8210-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8210-8, 2-pole miniature circuit breaker, D tripping characteristic, 40 kA breaking capacity at 400 V AC per IEC 60947-2, 2 MW wide, IP20.","salesMarkdown":"## What this MCB is and where it fits The Siemens SENTRON 5SY8210-8 is a 2-pole miniature circuit breaker with a D tripping characteristic, designed to handle high inrush currents typical of motor loads, transformers, and welding equipment in industrial control panels. It carries a 40 kA breaking capacity at 400 V AC per IEC 60947-2 and 15 kA at 60 V DC per the same standard, with an additional 5 kA rating at 400 V AC under UL 1077. The D curve means the magnetic trip operates at 10 to 20 times rated current, so it won't nuisance-trip on the startup surge of a motor or a power supply bank; that's the spec that decides whether your line stays up during a cold start. ## Panel fit and environmental tolerance At 36 mm wide (2 modular units), it snaps onto a DIN rail via the quick assembly system and can be mounted in any position — no orientation restrictions in a crowded enclosure. Depth is 76 mm with a 70 mm installation depth, so it clears most standard distribution board covers without interference. Rated IP20 with connected conductors — fine for dry indoor panels; not rated for washdown or outdoor exposure. Operating temperature spans -40 °C to 75 °C with derated humidity (95% at 55 °C, 55% at 70 °C, 35% at 75 °C), so it's suitable for unheated enclosures in cold climates or near heat-generating equipment. Halogen-free and silicon-free construction matters if this goes into a clean environment or near sensitive contacts where outgassing could cause corrosion.","metaTitle":"Siemens SENTRON 5SY8210-8 MCB, 2-Pole, D Curve, 40 kA IEC","metaDescription":"Siemens 5SY8210-8 SENTRON miniature circuit breaker, 2-pole, D tripping characteristic, 40 kA at 400 V AC per IEC 60947-2. IP20, halogen-free. Available 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":"5SY8210-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 2P, D10","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","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":"D","according to IEC 60947-2 rated value":"40 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/07af57761785b00da274cb9938e3d3c2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=29324&mlfb=5SY8210-8"},"ai":{"faq":[{"question":"Will the 5SY8210-8 drop into a panel designed for the 5SY4304-7CV?","answer":"Both are 2-pole SENTRON MCBs with the same 36 mm width and DIN-rail mounting, so the mechanical fit is identical — but verify the tripping characteristic and breaking capacity match your application, as the 5SY4304-7CV carries different ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8210-8","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/5SY8210-8 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}}