{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8225-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8225-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8225-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8225-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8225-8, miniature circuit breaker, 2-pole, D characteristic, 30 kA breaking capacity at 400 V AC per IEC 60947-2, 2 MW units, IP20.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 5SY8225-8 is a 2-pole miniature circuit breaker (MCB) with a D tripping characteristic, designed for branch-circuit protection in industrial control panels. It is rated for a breaking capacity of 30 kA at 400 V AC per IEC 60947-2, which means it can safely interrupt fault currents up to that level without upstream coordination failure — critical for high-fault installations like motor control centers or transformer secondaries. ## Key ratings and what they mean for fit The D-curve tolerates high inrush of motor loads, transformers, or welding equipment without nuisance tripping. Mounting is straightforward: the 36 mm width (2 modular units) snaps onto a DIN rail via the quick-assembly system, and it can be installed in any position. The IP20 rating (with connected conductors) is standard for enclosed panel use — not for washdown environments. Depth is 76 mm, installation depth 70 mm, so it sits flush with other SENTRON 5SY series breakers in a multi-unit assembly. ## Environmental and compliance profile Halogen-free and silicon-free construction suits clean-room or semiconductor-adjacent panels. Ambient temperature range is -40 °C to 75 °C. Pollution degree 3 and overvoltage category III mean it is rated for fixed installations in industrial environments with conductive pollution (e.g., dust, condensation). The sealable design allows the installer to lock the toggle position with a padlock — useful for lockout/tagout compliance on a branch circuit.","metaTitle":"Siemens 5SY8225-8 SENTRON MCB, 2P, D-curve, 30 kA IEC","metaDescription":"Siemens SENTRON 5SY8225-8 miniature circuit breaker, 2-pole, D tripping characteristic, 30 kA at 400 V AC per IEC 60947-2. Active production. Sourced to order against 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 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","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":"30 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":"2.1 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/797fbbdd33b19b9788d8ae04837aeb0f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=481210&mlfb=5SY8225-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8225-8/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does 5SY8225-8 carry?","answer":"It is certified to IEC / EN 60947-2 and UL 1077. The construction is halogen-free and silicon-free."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8225-8","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/5SY8225-8 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}}