{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7408-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7408-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7408-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7408-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7408-8CC, 4-pole miniature circuit breaker, 8 A rated, D tripping characteristic, 25 kA IEC 60947-2 breaking capacity at 400 V AC, 72 mm wide.","salesMarkdown":"It breaks faults up to 25 kA per IEC 60947-2 at 400 V AC, and carries a 5 kA rating under UL 1077 and CSA C22.2 No. 235 for North American panels. At 8 A, this MCB protects a circuit drawing up to roughly 1.8 kW on a 230 V line or 5.5 kW on a 400 V three-phase supply, depending on the load profile. That rating holds at 400 V AC, overvoltage category III — typical for distribution boards in industrial panels where fault currents are high. Wire range accepts 0.75 to 35 mm² solid or stranded, with a torque spec of 2.5 to 3.5 N·m on the screw terminals. The combined top and bottom terminals simplify daisy-chaining busbars or looping through the panel. The -25 to +55 °C ambient range covers most indoor industrial conditions; above 40 °C, derate per the thermal curve in the datasheet. At 72 mm wide (4 width units of 18 mm), it occupies four adjacent slots on the rail. Any mounting position is permitted, which helps when the panel layout is tight or the rail is vertical. The sealable feature allows lockout/tagout compliance for isolation procedures.","metaTitle":"Siemens 5SY7408-8CC SENTRON MCB, 4P, 8 A, D Curve, 25 kA","metaDescription":"Siemens 5SY7408-8CC SENTRON miniature circuit breaker, 4-pole, 8 A rated, D tripping characteristic, 25 kA IEC breaking capacity, 400 V AC. Current lifecycle stage. Sourced to orde","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":"72 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":"4","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":"4","Number of poles / Note":"4P","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=164327&mlfb=5SY7408-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7408-8CC/alternatives.json"},"ai":{"faq":[{"question":"Will 5SY7408-8CC fit in a panel designed for 5SY3132-6?","answer":"Both are 4-pole MCBs on the same DIN-rail footprint, so the mechanical mounting is the same. However, the 5SY7408-8CC has an 8 A D-curve rating versus the 5SY3132-6's different specs — verify the circuit's load and fault current requirements before swapping."},{"question":"What compliance documentation does 5SY7408-8CC carry?","answer":"It is rated under IEC 60947-2 (25 kA) and UL 1077 / CSA C22.2 No. 235 (5 kA). The product is halogen-free and silicon-free. Standard RoHS and REACH declarations are available from the manufacturer for this SENTRON series."},{"question":"How do I get current pricing and availability for 5SY7408-8CC?","answer":"Submit an RFQ through this listing. We source this active SENTRON MCB through independent distribution and confirm pricing and lead time at quote — no automated stock figures here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7408-8CC","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/5SY7408-8CC 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}}