{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4650-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4650-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4650-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4650-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY4650-8, 4-pole (3P+N), D tripping curve, 50 A rated current, 400 V AC, 10 kA / 15 kA breaking capacity, IP20.","salesMarkdown":"The Siemens 5SY4650-8 is a 4-pole (3P+N) miniature circuit breaker from the SENTRON series, with a D tripping curve rated at 50 A and 400 V AC. The 10 kA breaking capacity per EN 60898 and 15 kA per IEC 60947-2 give it headroom for industrial panel fault levels; the higher IEC figure is the one to use when coordinating with downstream MCCB or fuses in a 400 V distribution board. If this breaker sits downstream of a larger MCCB or fuse, the let-through energy (I²t) at 15 kA is low enough that a properly sized upstream device can provide full selectivity up to that fault level. The D curve's higher magnetic threshold also helps with selective coordination against nuisance trips on motor-start transients. Environmental range is wide: -40 °C to +75 °C ambient, with humidity derating above 55 °C (max 95% RH at 55 °C, dropping to 35% at 75 °C). Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz — typical for machine-mounted panels.","metaTitle":"Siemens 5SY4650-8 SENTRON MCB, 4P D-curve 50A, 10kA/15kA","metaDescription":"Siemens 5SY4650-8 SENTRON miniature circuit breaker, 4-pole 3P+N, D tripping curve, 50 A, 400 V AC, 10 kA (EN 60898) / 15 kA (IEC 60947-2). Active production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY4650-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 3+N-pole, D, 50 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","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","acc. to IEC 81346-2":"F","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","operational current / at AC / rated value":"50 A","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"Yes","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$120.65","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8dc26477d7b2ed62804b7f534a4ecb11.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=298360&mlfb=5SY4650-8"},"ai":{"faq":[{"question":"Where can I buy the 5SY4650-8?","answer":"This part is 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 5SY4650-8?","answer":"10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC. The higher IEC figure is the one to use for industrial fault-level coordination."},{"question":"Will the 5SY4650-8 drop into a panel specified around the 5SY7140-8CC?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint (4 MW, 72 mm wide), so mechanical fit is the same. The 5SY4650-8 is a D-curve 50 A device; the 5SY7140-8CC is a C-curve 40 A device. If the panel was wired for 40 A C-curve, swapping to a 50 A D-curve changes the overcurrent protection rating and the trip characteristic — verify the branch circuit's conductor sizing and load type before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4650-8","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/5SY4650-8 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}}