{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4304-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4304-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4304-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4304-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4304-8, 3-pole miniature circuit breaker, D tripping curve, 4 A rated, 400 V AC, 10 kA breaking capacity per EN 60898.","salesMarkdown":"## D-curve 4 A, 3-pole — what it handles The 5SY4304-8: That 10 kA figure is the standard for branch-circuit protection in most industrial panels — it clears a bolted fault before the upstream device has to intervene. ## Breaking capacity and DC rating For DC circuits it's rated 15 kA at 60 V (max 72 V), which covers control-power and battery-backed bus protection. The 3-pole design switches all three phases simultaneously — no neutral pole. ## Panel fit and environmental range The 5SY4304-8 is certified to IEC / EN 60898-1 (domestic and similar installations) and IEC / EN 60947-2 plus UL1077 (industrial and supplementary protection). That dual rating means it can serve as a branch-circuit breaker in a UL 508A panel or as a final-subcircuit breaker in a European-style distribution board.","metaTitle":"Siemens 5SY4304-8 SENTRON MCB, 3-Pole D 4A, 400V 10kA","metaDescription":"Siemens 5SY4304-8 SENTRON miniature circuit breaker, 3-pole, D-curve, 4A, 400V AC, 10kA breaking per EN 60898. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY4304-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 10kA, 3-pole, D, 4A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","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":"3","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"D","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"35 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":"$30.48","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cc309a00b4f67fc3291fd2cbc946e1b3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=79416&mlfb=5SY4304-8"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4304-8?","answer":"For DC circuits, 15 kA at 60 V per IEC 60947-2."},{"question":"Can the 5SY4304-8 be used for DC circuits?","answer":"Yes, it is rated 60 V DC with a 15 kA breaking capacity per IEC 60947-2, suitable for 48 VDC bus or similar DC loads in a panel."},{"question":"What standards does the Siemens 5SY4304-8 comply with?","answer":"The UL/CSA rating is 5 kA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4304-8","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/5SY4304-8 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}}