{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7520-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7520-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7520-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7520-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7520-7CC, miniature circuit breaker, 1P+N, 20 A, C characteristic, 25 kA per IEC 60947-2, 2 MW, AC 250 V.","salesMarkdown":"## Thermal derating — the real-world current capacity The 20 A rating holds at 35 °C ambient. Above that, the thermal-magnetic element must be derated: 18.54 A at 40 °C, 17.76 A at 45 °C, 16.94 A at 50 °C, and 16.08 A at 55 °C. If the panel ambient runs at 50 °C, this breaker is effectively a 17 A device. The datasheet also specifies the surrounding humidity envelope: max 95% RH up to 55 °C, tapering to 35% at 75 °C. For a sealed enclosure with internal heat rise, factor the derating into the load calculation before committing the BOM line. The quick-assembly fastening system snaps onto the rail without tools. Combined terminals at both top and bottom accept the incoming and outgoing conductors — no need for a separate neutral bar if the circuit requires neutral switching. ## Compliance and material declarations Halogen-free and silicon-free construction, per the spec. Sealable — the breaker accepts a lockout tagout hasp for LOTO procedures. The product designation per EN 61346-2 and IEC 81346-2 is function code F (protective device). Suitability is marked for mechanical engineering and industry applications. The IP20 protection class applies with connected conductors, meaning the terminals are finger-safe once wired.","metaTitle":"Siemens 5SY7520-7CC SENTRON MCB, 20A C-Curve 1P+N, 25kA","metaDescription":"Siemens 5SY7520-7CC SENTRON miniature circuit breaker, 20 A rated, C characteristic, 1P+N, 25 kA breaking capacity per IEC 60947-2. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"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","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"20 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","at 35 °C rated value":"20 A","at 40 °C rated value":"18.54 A","at 45 °C rated value":"17.76 A","at 50 °C rated value":"16.94 A","at 55 °C rated value":"16.08 A","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to IEC 60947-2 rated value":"25 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","operating voltage at DC rated value maximum":"72 V","with single-phase operation at AC rated value":"250 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Switching Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.7 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/670d71d6e460fcdd77330e1b99ee5862.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=3489&mlfb=5SY7520-7CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7520-7CC/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY7520-7CC?","answer":"Rated 25 kA per IEC 60947-2 at 250 V AC, single-phase operation. That is the short-circuit current it can safely interrupt."},{"question":"Where can I buy the 5SY7520-7CC?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the difference between the 5SY7520-7CC and the 5SY4125-7CV?","answer":"The 5SY4125-7CV is a 25 A C-curve MCB in the same SENTRON family but with a different pole configuration and breaking capacity. The 5SY7520-7CC is 20 A, 1P+N, 25 kA; the 5SY4125-7CV is 25 A, 1P, with a lower interrupting rating. They are not drop-in substitutes — verify the load current and fault current requirements before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7520-7CC","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/5SY7520-7CC 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}}