{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4405-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4405-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4405-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4405-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4405-8 miniature circuit breaker, 4-pole, D-curve, 0.5 A AC rated, 10 kA (EN 60898) and 35 kA (IEC 60947-2) breaking capacity, current production.","salesMarkdown":"The 5SY4405-8: Mounts via the quick fastening system onto standard DIN rail; any orientation works. Installation depth is 70 mm—room behind the panel for cable dress. Width is 72 mm (4 modular units), depth 76 mm, height 90 mm. Touch protection and IP20 with connected conductors make it safe for live panels. Pollution degree 3 suits industrial environments with non-condensing humidity up to 95%. Halogen-free and silicon-free construction meets clean environment requirements. Sealable terminals allow tamper-proofing per site safety rules.","metaTitle":"Siemens 5SY4405-8 SENTRON MCB, 4P D 0.5A","metaDescription":"Siemens SENTRON 5SY4405-8 miniature circuit breaker, 4-pole, D-curve, 0.5 A AC, 10 kA (EN 60898) / 35 kA (IEC 60947-2). Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","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":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","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":"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","operational current / at AC / rated value":"0.5 A","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":"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":"$338.66","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=108079&mlfb=5SY4405-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4405-8/alternatives.json"},"ai":{"faq":[{"question":"What is 5SY4405-8's listed depth?","answer":"The depth is 76 mm."},{"question":"What is 5SY4405-8's listed width?","answer":"The width is 72 mm (4 modular units)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4405-8","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/5SY4405-8 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}}