{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8450-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8450-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8450-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8450-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8450-7, 4-pole miniature circuit breaker, C-curve, 50 A rated, 25 kA breaking capacity per IEC 60947-2, 440 V AC.","salesMarkdown":"For DC circuits it's rated 15 kA at 72 V, so it handles battery-bank or rectifier faults in the same panel. Rated current is 50 A at 45 °C; at 55 °C it derates to 47.85 A, and at 50 °C it's 48.95 A, so plan the load at the panel's ambient temperature, not the breaker's label. The quick-assembly fastening system means it clips onto the DIN rail without tools and the combined top/bottom terminals accept both busbar and wire — no need to swap terminal types between incoming and outgoing. IP20 with connected conductors — fine inside a closed enclosure, not for wet areas. Sealable, halogen-free, silicon-free — relevant if the panel goes into a food-processing or semiconductor fab environment where outgassing or tamper-proofing is specified. Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz, so it holds up on a machine frame or conveyor line. Designed for mechanical engineering and industry per the manufacturer's suitability statement. The product designation follows EN 61346-2 and IEC 81346-2 function code F (protective device). Touch protection is built in — no exposed live parts when wired. Humidity limits: 95% up to 55 °C, 55% up to 70 °C, 35% up to 75 °C. The neutral conductor is not switched (solid neutral through the 4-pole frame).","metaTitle":"Siemens 5SY8450-7 SENTRON MCB, 4P C-Curve 50 A, 25 kA","metaDescription":"Siemens 5SY8450-7 SENTRON 4-pole MCB, C-curve, 50 A rated, 25 kA breaking capacity per IEC 60947-2. Current lifecycle. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"50 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","according to EN 61346-2":"F","at 45 °C / rated value":"50 A","at 50 °C / rated value":"48.95 A","at 55 °C / rated value":"47.85 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","according to IEC 60947-2 / rated value":"25 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","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"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=283992&mlfb=5SY8450-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8450-7/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 5SY8450-7 and how is it quoted for volume purchases?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or price lists are published here."},{"question":"What is 5SY8450-7's listed depth and width?","answer":"Depth is 76 mm (70 mm installation depth), width is 72 mm (4 modular units). Height is 90 mm."},{"question":"Will 5SY8450-7 drop into a panel specified around 5SY4140-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint, so the mechanical fit is the same. The difference is the rating: 5SY8450-7 is a 50 A C-curve, while 5SY4140-7 is a lower-current variant. If the existing panel's busbar and wire are sized for 50 A, it drops in; if the circuit was designed for a smaller breaker, the wire and upstream protection must be checked first."},{"question":"What compliance documentation does Siemens provide for 5SY8450-7?","answer":"The part carries IEC 60947-2 ratings (25 kA breaking capacity at 440 V AC, 15 kA at 72 V DC) and is designed to EN 61346-2 / IEC 81346-2 function code F. It is halogen-free and silicon-free. Specific RoHS/REACH/UL declarations should be requested at quote time — the evidence does not list those certificates directly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8450-7","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/5SY8450-7 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}}