{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7108-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7108-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7108-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7108-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7108-8CC, 1-pole miniature circuit breaker, D tripping characteristic, 8 A rated current at 400 V AC, 25 kA breaking capacity per IEC 60947-2, 1 width unit (18 mm), IP20.","salesMarkdown":"The 5SY7108-8CC is a Siemens SENTRON miniature circuit breaker — a 1-pole (1P) unit with a D tripping characteristic, rated 8 A at 400 V AC. The 25 kA breaking capacity per IEC 60947-2 tells you this breaker can safely interrupt a fault current up to 25,000 A at 400 V AC without welding its contacts or venting arc gas into the panel — that's a high-interrupting rating for a single-module (18 mm wide) MCB, sized for industrial main or sub-distribution boards where the prospective short-circuit current is substantial. Under UL 1077 and CSA C22.2 No. 235, the same breaker is rated 5 kA, which is the relevant figure for North American supplementary protection applications. The terminal range accepts solid or stranded copper from 0.75 mm² up to 35 mm², with a tightening torque of 2.5 to 3.5 N·m. That 35 mm² top end is unusually large for a single-pole 8 A breaker — it means the terminals are physically sized to accept a feeder conductor that is much heavier than the load current requires, which is useful when the breaker is used as a tap protector or when the same panel design uses a common busbar size across multiple breaker ratings. The combined terminal design (top and bottom) accepts both busbar pins and screw-clamp conductors, so it drops into a SENTRON distribution board without extra adapters. The breaker is sealable, halogen-free, silicon-free, and rated IP20 with conductors connected. Compliance documentation is standard for a Siemens SENTRON product: the breaker carries IEC 60947-2 certification (the 25 kA rating), UL 1077 and CSA C22.2 No. 235 recognition (5 kA), and is designed to meet RoHS and REACH requirements. The product designation per DIN EN 61346-2 and DIN EN 81346-2 is 'F' (protective device). ## Deployment context The ambient temperature range is -25 to +55 °C, with humidity derating up to 95% at 55 °C, 55% at 70 °C, and 35% at 75 °C. Storage range is wider: -40 to +75 °C. The touch protection feature (finger-safe terminals when conductors are connected) is standard for the 5SY7 series.","metaTitle":"Siemens 5SY7108-8CC SENTRON MCB, 1P, D-curve, 8 A, 25 kA IEC","metaDescription":"Siemens 5SY7108-8CC SENTRON miniature circuit breaker, 1-pole, D tripping characteristic, 8 A rated current, 25 kA breaking capacity per IEC 60947-2, 400 V AC. Current lifecycle st","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"18 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"1","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"1","Number of poles / Note":"1P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY7CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"8 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"25 kA","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=509039&mlfb=5SY7108-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7108-8CC/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 5SY7108-8CC accept?","answer":"The terminals accept solid copper from 0.75 mm² to 35 mm² and stranded copper from 0.75 mm² to 35 mm². The tightening torque is 2.5 to 3.5 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7108-8CC","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/5SY7108-8CC 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}}