{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8402-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8402-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8402-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8402-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8402-7 miniature circuit breaker, 4-pole, C-tripping characteristic, 70 kA at 400 V AC per IEC 60947-2, 72 mm wide, 76 mm deep.","salesMarkdown":"The Siemens 5SY8402-7 is a 4-pole miniature circuit breaker from the SENTRON family, rated with a C tripping characteristic and a breaking capacity of 70 kA at 400 V AC per IEC 60947-2. It also carries a UL 1077 listing for 5 kA at 480 V AC, making it suitable for both IEC and North American panel designs. Temperature derating is built into the design: the breaker is rated for ambient conditions up to 95% humidity at 55 °C, 55% at 70 °C, and 35% at 75 °C. Vibration resistance per IEC 60068-2-6 (±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz) confirms it holds up on conveyor lines or compressor skids.","metaTitle":"Siemens 5SY8402-7 SENTRON MCB, 4P, C-curve, 70 kA IEC","metaDescription":"Siemens 5SY8402-7 SENTRON miniature circuit breaker, 4-pole, C-curve, 70 kA breaking capacity at 400 V AC per IEC 60947-2. Active production. Sourced to order against RFQ.","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":"5SY8402-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 4P, C2","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","at AC rated value":"400 V","at DC rated value":"60 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to IEC 60947-2 rated value":"70 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","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/aeecd5d56e05beaddc45833321372cc1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=298387&mlfb=5SY8402-7"},"ai":{"faq":[{"question":"What is the 5SY8402-7's depth?","answer":"The depth is 76 mm, with an installation depth of 70 mm behind the panel."},{"question":"Will 5SY8402-7 drop into a panel specified around 5SY4140-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint (4 modular units wide, 72 mm). The 5SY8402-7 has a higher breaking capacity (70 kA vs the 5SY4140-7's rating), so it can replace the lower-rated unit directly as long as the fault current at the panel does not exceed the 5SY4140-7's original rating — meaning no rewiring needed for the same application, but verify the available fault current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8402-7","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/5SY8402-7 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}}