{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5405-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5405-7","canonicalUrl":"https://aoctrl.com/siemens/5SY5405-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5405-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5405-7 miniature circuit breaker, 4-pole, C tripping characteristic, 0.5 A rated current, 10 kA breaking capacity AC/DC, 4 MW units.","salesMarkdown":"Breaking capacity is 10 kA per EN 60898 on AC and 10 kA per EN 60898-2 on DC up to 880 V. The DC polarity must be observed (AC supply is polarity-independent). Rated for universal current (AC/DC), so it works on both supply types without swapping the internal mechanism. Overvoltage category II and pollution degree 2 suit it for fixed-installation distribution panels in clean indoor environments. ## Temperature derating — the number that matters for dense panels At 40 °C ambient the 0.5 A rating derates to 0.48 A; at 50 °C it drops to 0.45 A; at 60 °C it is 0.42 A. In a tightly packed DIN-rail enclosure, internal temperature can reach 50–60 °C. IP20 with connected conductors — not rated for washdown, but fine inside a sealed enclosure. Listed as current production (active lifecycle stage). No PCN or end-of-life notice.","metaTitle":"Siemens 5SY5405-7 SENTRON MCB, 4P C-curve 0.5A 10kA","metaDescription":"Siemens 5SY5405-7 SENTRON miniature circuit breaker, 4-pole, C-curve, 0.5 A rated. 10 kA breaking capacity AC/DC. Active production. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY5405-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker Universal current 880 V DC 400 V AC 10kA, 4-pole, C, 0.5 A max. 1000 V DC","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC/DC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"0.5 A","at DC / rated value":"880 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"II","Combined Terminal Top":"Yes","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 40 °C / rated value":"0.48 A","at 45 °C / rated value":"0.46 A","at 50 °C / rated value":"0.45 A","at 55 °C / rated value":"0.44 A","at 60 °C / rated value":"0.42 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"universal current","at DC / acc. to EN 60898-2":"10 kA","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"AC as required, observe DC polarity","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","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":"1 000 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/4d796d5a94fe63bd69791ffa6c51b41d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=490809&mlfb=5SY5405-7"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5405-7","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/5SY5405-7 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}}