{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4508-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4508-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4508-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4508-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4508-8, miniature circuit breaker, 2-pole (1P+N), 8 A rated, D tripping characteristic, 10 kA (EN 60898) / 20 kA (IEC 60947-2), 2 MW, IP20, halogen-free.","salesMarkdown":"## Thermal derating and ambient limits The 8 A rating holds at 35 °C ambient. Above that, the thermal-magnetic trip derates linearly: 7.51 A at 40 °C, 7.26 A at 45 °C, 6.99 A at 50 °C, 6.72 A at 55 °C, and 6.43 A at 60 °C. Halogen-free and silicon-free construction, sealable for tamper-proofing. The 5SY4508-8 is an active catalog line within the SENTRON family, so it's specified into new BOMs without a last-time-buy clock.","metaTitle":"Siemens 5SY4508-8 SENTRON MCB, 2-pole 8A D-curve, 10kA","metaDescription":"Siemens 5SY4508-8 SENTRON miniature circuit breaker, 2-pole 1P+N, 8 A rated, D tripping characteristic, 10 kA breaking capacity per EN 60898, 20 kA per IEC 60947-2. Current product","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","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","at AC / rated value":"8 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"8 A","at 40 °C / rated value":"7.51 A","at 45 °C / rated value":"7.26 A","at 50 °C / rated value":"6.99 A","at 55 °C / rated value":"6.72 A","at 60 °C / rated value":"6.43 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"20 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 Function / Neutral Conductor Switching":"Yes","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/114d4f6f779d30bd6aa2ed2dce03bc67.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=450852&mlfb=5SY4508-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4508-8/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4508-8","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/5SY4508-8 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}