{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7204-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7204-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7204-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7204-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7204-8CC miniature circuit breaker, D-characteristic, 4 A, 2-pole, 30 kA IEC 60947-2, 5 kA UL 1077, IP20.","salesMarkdown":"## What the D-curve and 4 A rating mean for the panel The 5SY7204-8CC: The D-characteristic trips magnetically at 10–20× In (40–80 A instantaneous), so it's sized for loads with high inrush — motor starters, small transformers, solenoid banks — where a B- or C-curve would nuisance-trip on startup. The 4 A thermal element holds continuously at nominal, but the spec table shows derating above 35 °C: 3.71 A at 40 °C, 3.55 A at 45 °C, 3.39 A at 50 °C, and 3.22 A at 55 °C. ## Breaking capacity and approvals — IEC vs UL/CSA The UL 1077 / CSA C22.2 No.235 listing at 5 kA is a supplementary-protector rating, not a branch-circuit rating — relevant for North American panels where this breaker protects individual loads, not feeders. Two modular-width units (36 mm wide) on a DIN rail. Combined top and bottom terminals, touch-protected, sealable. Halogen-free and silicon-free construction.","metaTitle":"Siemens 5SY7204-8CC SENTRON MCB, D-curve 4A 2P, 30kA","metaDescription":"Siemens 5SY7204-8CC SENTRON miniature circuit breaker, D-characteristic, 4A, 2-pole, 30kA IEC breaking capacity. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY7204-8CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 15kA, 2-pole, D, 4 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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","at AC / rated value":"4 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"4 A","at 40 °C / rated value":"3.71 A","at 45 °C / rated value":"3.55 A","at 50 °C / rated value":"3.39 A","at 55 °C / rated value":"3.22 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"30 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","Type Of Voltage / Of The Operating Voltage":"AC","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 Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c5c85080012d82ff26712afeef4e4228.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=537510&mlfb=5SY7204-8CC"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7204-8CC?","answer":"30 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235."},{"question":"What is the difference between 5SY7204-8CC and a C-curve 4A breaker?","answer":"The D-curve trips magnetically at 10–20× In versus a C-curve at 5–10× In. For a 4 A D-curve, the instantaneous magnetic trip threshold is 40–80 A, so it won't nuisance-trip on the inrush of a small motor or transformer that would pop a C-curve."},{"question":"Where can I buy 5SY7204-8CC?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7204-8CC","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/5SY7204-8CC 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}}