{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4205-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4205-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4205-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4205-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY4205-5, 2-pole, 0.5 A, tripping characteristic A, 10 kA per EN 60898, 35 kA per IEC 60947-2, 15 kA DC, 5 kA UL 1077/CSA.","salesMarkdown":"## Breaking capacity and approvals Rated breaking capacity hits 10 kA per EN 60898, 35 kA per IEC 60947-2, 15 kA at DC per IEC 60947-2, and 5 kA per UL 1077 and CSA C22.2 No. 235 — so it covers both residential-panel and industrial-distribution fault levels, plus DC circuits in control panels or battery-backed loads. ## Thermal derating and environment At 35 °C the breaker holds its full 0.5 A rating; at 45 °C it derates to 0.45 A, at 50 °C to 0.44 A, at 55 °C to 0.42 A, and at 60 °C to 0.4 A. Ambient range spans -40 °C to 75 °C, with humidity limits of 95 % up to 55 °C, 55 % up to 70 °C, and 35 % up to 75 °C. That wide range fits unheated enclosures or outdoor cabinets.","metaTitle":"Siemens 5SY4205-5 SENTRON MCB, 2-Pole, 0.5 A, Char A","metaDescription":"Siemens 5SY4205-5 SENTRON miniature circuit breaker, 2-pole, 0.5 A, tripping characteristic A, 10 kA (EN 60898) / 35 kA (IEC 60947-2). Current lifecycle. Sourced to order against R","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY4205-5","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 2-pole, A, 0.5 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","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":"0.5 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"0.5 A","at 45 °C / rated value":"0.45 A","at 50 °C / rated value":"0.44 A","at 55 °C / rated value":"0.42 A","at 60 °C / rated value":"0.4 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"A","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"35 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","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","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/36712fded084c0293b0b4ed71177b96a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=524731&mlfb=5SY4205-5"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4205-5?","answer":"It carries 10 kA per EN 60898, 35 kA per IEC 60947-2, 15 kA DC per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"What is the tripping characteristic of 5SY4205-5?","answer":"Tripping characteristic A — trips faster than B or C curves on low-level faults, designed for semiconductor or long-cable protection."},{"question":"Where can I buy 5SY4205-5?","answer":"Sourced to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4205-5","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/5SY4205-5 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}}