{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8310-8BB08","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8310-8BB08","canonicalUrl":"https://aoctrl.com/siemens/5SY8310-8BB08","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8310-8BB08","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8310-8BB08, 3-pole miniature circuit breaker, D tripping characteristic, 10 A rated current, 40 kA breaking capacity at 440 V AC per IEC 60947-2, magnetic-only trip, IP20 with connected conductors.","salesMarkdown":"It's a magnetic-only trip unit — no thermal bimetal, so it's built for applications where short-circuit protection is the priority and overloads are handled upstream or by the load itself. Rated 10 A continuous, it'll hold a 4 kW motor on 400 V three-phase without tripping on start. The 40 kA IEC 60947-2 rating is the headline number for industrial panels; the UL 1077 listing at 5 kA covers North American branch circuits. Pollution degree 3 (industrial environment) and overvoltage category III (distribution level) mean it's rated for the dirt and spikes you see in a real panel. Mounts in any position. IP20 with connected conductors is standard for enclosed panels; keep the front cover on. The 5SY series is a broad SENTRON family; this variant is the magnetic-only D10 3-pole. No direct replacement needed — it's the active part.","metaTitle":"Siemens 5SY8310-8BB08 SENTRON MCB, 3P D10, 40 kA IEC","metaDescription":"Siemens 5SY8310-8BB08 SENTRON miniature circuit breaker, 3-pole, D-curve, 10 A rated, 40 kA breaking capacity at 440 V AC per IEC 60947-2. Active production, sourced to order. Requ","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":"5SY8310-8BB08","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 25kA, 3-pole, 10A, D=70 mm only magnetic tripping","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":"10 A","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","Design Of The Product":"Only magnetic tripping operation","according to EN 61346-2":"F","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","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","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/d749372eeb1ddb1643ab0beb24fbbdcd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=133271&mlfb=5SY8310-8BB08"},"ai":{"faq":[{"question":"Where can I buy the 5SY8310-8BB08 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of the 5SY8310-8BB08?","answer":"40 kA at 440 V AC per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No.235."},{"question":"What tripping curve does the 5SY8310-8BB08 use?","answer":"D-curve, magnetic-only trip — no thermal element. Designed for motor and transformer primary protection where inrush is high."},{"question":"Will the 5SY8310-8BB08 fit a panel designed for a 5SY4304-7CV?","answer":"Both are 3-pole, DIN-rail mount, same modular width per pole. The 5SY8310-8BB08 is a D10 magnetic-only; the 5SY4304-7CV is a different rating and characteristic — check the specific current and curve before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8310-8BB08","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/5SY8310-8BB08 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}}