{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8214-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8214-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8214-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8214-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY8214-8, 2-pole, D characteristic, 400 V AC, 70 kA breaking capacity per IEC 60947-2, 0.3 A at 45 °C.","salesMarkdown":"## Siemens SENTRON 5SY8214-8 — 2-pole D-curve MCB for high-fault industrial panels The Siemens SENTRON 5SY8214-8 is a 2-pole miniature circuit breaker with a D tripping characteristic, rated at 400 V AC and a breaking capacity of 70 kA per IEC 60947-2. At DC per IEC 60947-2 it breaks 15 kA; under UL 1077 it is rated 5 kA. ## Thermal derating and environmental tolerance Rated current is 0.3 A at 45 °C, derating to 0.29 A at 50 °C and 0.28 A at 55 °C. The breaker operates across -40 °C to 75 °C, with humidity tolerance up to 95% at 55 °C, 55% at 70 °C, and 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz, so it holds calibration in machinery-mounted enclosures. The sealable design allows panel builders to lock settings after commissioning. Halogen-free and silicon-free construction avoids outgassing issues near sensitive electronics or in clean-room environments.","metaTitle":"Siemens SENTRON 5SY8214-8 MCB, 2-Pole D-Curve, 400 V AC, 70","metaDescription":"Siemens SENTRON 5SY8214-8 miniature circuit breaker, 2-pole, D tripping characteristic, 400 V AC, 70 kA breaking capacity per IEC 60947-2. Active production, sourced 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":"5SY8214-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 2P, D0.3","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","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 AC / rated value":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"0.3 A","at 50 °C / rated value":"0.29 A","at 55 °C / rated value":"0.28 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"70 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","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","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","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","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3996d7cdbe758f389e369de9ad9e3175.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=302064&mlfb=5SY8214-8"},"ai":{"faq":[{"question":"Where can I buy 5SY8214-8 and what is the lead time?","answer":"The 5SY8214-8 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead-time estimate."},{"question":"What is the breaking capacity of 5SY8214-8 at 400 V AC?","answer":"70 kA per IEC 60947-2, with 15 kA DC per the same standard and 5 kA under UL 1077 / CSA C22.2 No. 235."},{"question":"What compliance documentation does Siemens provide for 5SY8214-8?","answer":"The part carries IEC 60947-2, UL 1077, and CSA C22.2 No. 235 ratings. It is halogen-free and silicon-free. Specific RoHS/REACH declarations are available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8214-8","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/5SY8214-8 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}}