{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7308-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7308-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7308-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7308-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7308-8CC, 3-pole miniature circuit breaker, D tripping characteristic, 8 A rated current, 400 V AC, 25 kA breaking capacity per IEC 60947-2, UL 1077 listed at 5 kA.","salesMarkdown":"## Integrator's spec recap — 5SY7308-8CC Breaking capacity is 25 kA per IEC 60947-2, which gives solid selectivity headroom downstream of a 25 kA-rated main breaker; under UL 1077 / CSA C22.2 No. 235 it's listed at 5 kA — enough for most North American panelboards where the utility transformer limits fault current. Terminals accept 0.75 to 35 mm² solid or stranded copper — covers everything from control-circuit tails to feeder-sized conductors — and the screw terminals torque to 2.5–3.5 N·m, typical for this class. Width is 54 mm (3 width units on a DIN rail), depth 76 mm, installation depth 70 mm — drops into any standard 35 mm DIN-rail enclosure with room for gland plates and wiring ducts. Mounting position is any; ambient range -25 to +55 °C, storage -40 to +75 °C. Sealable terminals and touch protection are built in — useful for installations that require lockout/tagout or anti-tamper provisions. Halogen-free and silicon-free construction, overvoltage category III, suitable for mechanical engineering and industrial environments per the manufacturer's designation. Rated frequency 50/60 Hz, DC maximum rated voltage 72 V — covers both AC and some DC control circuits, though the D-curve is optimized for AC inductive loads.","metaTitle":"Siemens 5SY7308-8CC SENTRON MCB, 3P D-8A, 25 kA IEC","metaDescription":"Siemens 5SY7308-8CC SENTRON miniature circuit breaker, 3-pole, D-curve, 8 A, 400 V AC, 25 kA breaking capacity per IEC 60947-2. UL 1077 listed at 5 kA. Active production, sourced t","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"54 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":"3","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":"3","Number of poles / Note":"3P","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":"https://cdn.aoctrl.com/e80eca6d4f9f57f33da6428d56452bca.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=395320&mlfb=5SY7308-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7308-8CC/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 5SY7308-8CC accept?","answer":"Solid or stranded copper from 0.75 mm² up to 35 mm², with screw terminals torqued to 2.5–3.5 N·m."},{"question":"Will 5SY7308-8CC fit in a panel designed for 5SY3132-6?","answer":"Both are 3-pole DIN-rail MCBs with similar width (54 mm / 3 width units), so the mechanical footprint is compatible, but verify the rated current and breaking capacity match your design — the 5SY7308-8CC is 8 A D-curve with 25 kA IEC, while the 5SY3132-6 has different ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7308-8CC","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/5SY7308-8CC 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}}