{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4520-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4520-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4520-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4520-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4520-5 miniature circuit breaker, 20 A AC, characteristic A, 2-pole 1P+N, 10 kA per EN 60898 / 20 kA per IEC 60947-2, IP20, halogen-free, 2 MW units.","salesMarkdown":"## Siemens 5SY4520-5 — SENTRON MCB, 20 A, Characteristic A It carries a 10 kA breaking capacity per EN 60898-1 and a 20 kA rating per IEC 60947-2 / UL 1077, so it handles both residential and industrial fault-current levels. The characteristic A curve trips between 2 and 3 times rated current — suited for protecting semiconductor circuits or long cable runs where fast reaction to low-level overcurrents is needed, not motor or transformer inrush. At 35 °C ambient the 5SY4520-5 carries its full 20 A. At 40 °C it derates to 18.78 A, at 50 °C to 17.48 A, and at 60 °C to 16.08 A. The operating range spans -40 °C to 75 °C, with humidity limits: max 95 % RH up to 55 °C, then derated to 35 % at 75 °C. That covers most indoor industrial and outdoor cabinet environments. The 5SY4520-5 snaps onto a DIN rail via the quick assembly system and occupies 2 modular width units (36 mm wide, 90 mm tall, 76 mm deep). Installation depth is 70 mm. It mounts in any position, and the supply cord can enter from any side. The terminals are combined (top and bottom), accepting conductors for a clean panel layout. The 5SY4520-5 is certified to IEC / EN 60898-1 and IEC / EN 60947-2 / UL 1077. The enclosure is sealable and provides touch protection (IP20 with connected conductors). The product designation per EN 61346-2 and IEC 81346-2 is letter F (protective device).","metaTitle":"Siemens 5SY4520-5 SENTRON MCB, 20 A, Characteristic A, 2-Pol","metaDescription":"Siemens 5SY4520-5 SENTRON miniature circuit breaker, 20 A AC, tripping characteristic A, 2-pole (1P+N), 10 kA (EN 60898) / 20 kA (IEC 60947-2), IP20, halogen-free. Current producti","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","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","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","at AC / rated value":"20 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","according to EN 61346-2":"F","at 35 °C / rated value":"20 A","at 40 °C / rated value":"18.78 A","at 45 °C / rated value":"18.14 A","at 50 °C / rated value":"17.48 A","at 55 °C / rated value":"16.8 A","at 60 °C / rated value":"16.08 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"A","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"10 kA","according to IEC 60947-2 / rated value":"20 kA","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","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","at DC / according to IEC 60947-2 / rated value":"15 kA","Product Component / Neutral Conductor Switching":"Yes","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=84902&mlfb=5SY4520-5","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4520-5/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4520-5?","answer":"The 5SY4520-5 has a 10 kA breaking capacity per EN 60898-1 and a 20 kA rating per IEC 60947-2 / UL 1077."},{"question":"What compliance documentation does Siemens provide for the 5SY4520-5?","answer":"The 5SY4520-5 is certified to IEC / EN 60898-1 and IEC / EN 60947-2 / UL 1077. It is halogen-free and silicon-free. The enclosure is sealable and touch-protected (IP20)."},{"question":"Where can I buy the 5SY4520-5 and how is it quoted?","answer":"The 5SY4520-5 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are listed here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4520-5","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/5SY4520-5 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}}