{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8310-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8310-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8310-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8310-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY8310-8, D characteristic, 3-pole, 40 kA breaking capacity at 400 V AC per IEC 60947-2, 15 kA at 60 V DC, 54 x 90 x 76 mm, IP20.","salesMarkdown":"## Siemens 5SY8310-8 SENTRON MCB — D Curve, 3-Pole, 40 kA The Siemens 5SY8310-8 is a SENTRON miniature circuit breaker (MCB) with a D tripping characteristic, 3 poles, and a rated breaking capacity of 40 kA at 400 V AC per IEC 60947-2. At 60 V DC it interrupts 15 kA per the same standard, and under UL 1077 it is rated for 5 kA. That is a high-interrupting rating for a 3-MW-wide device — it belongs in a panel with a substantial upstream transformer or a high-fault utility feed. The 15 kA DC rating at 60 V covers battery-backed or rectified DC bus circuits common in industrial control. That is deliberately high: it passes the starting surge of a motor, a power supply capacitive bank, or a welding transformer without opening. The trade-off is that a hard short circuit on a long cable run may not be seen as quickly as with a B or C curve — coordination with downstream protection matters. Ambient derating is specified: max 95% humidity at 55 °C, 55% at 70 °C, and 35% at 75 °C. In a non-climate-controlled enclosure (rooftop, desert, freezer aisle), you stay within that envelope. The vibration resistance per IEC 60068-2-6 (±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz) covers typical industrial machinery vibration. The 5SY8310-8 is certified to IEC / EN 60947-2 and UL 1077. It is halogen-free and silicon-free — relevant for panels in semiconductor fabs, medical device manufacturing, or any cleanroom where outgassing contaminants must be avoided. That is not a wear-out limit for most panel applications — it is a reliability benchmark for the mechanism.","metaTitle":"Siemens 5SY8310-8 SENTRON MCB, D Curve, 3-Pole, 40 kA IEC","metaDescription":"Siemens 5SY8310-8 SENTRON miniature circuit breaker, D tripping characteristic, 3-pole, 40 kA at 400 V AC per IEC 60947-2. Current lifecycle stage. Quoted to order. Halogen-free.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY8310-8","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, 3P, D10","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","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":"3","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/d297bb59310f136b0ce2b94643aa85f5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=211925&mlfb=5SY8310-8"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY8310-8?","answer":"40 kA at 400 V AC per IEC 60947-2, 15 kA at 60 V DC per the same standard, and 5 kA under UL 1077."},{"question":"What compliance documentation does Siemens provide for 5SY8310-8?","answer":"The MCB is certified to IEC/EN 60947-2 and UL 1077. It is halogen-free and silicon-free. Full RoHS, REACH, and manufacturer declarations are available with the shipment."},{"question":"Where can I buy 5SY8310-8 and how is it quoted?","answer":"This part is sourced through independent distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8310-8","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/5SY8310-8 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}}