{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5220-7CC12","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5220-7CC12","canonicalUrl":"https://aoctrl.com/siemens/5SY5220-7CC12","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5220-7CC12","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5220-7CC12, 2-pole DC miniature circuit breaker, C-curve, 20 A at 35 °C, rated voltage 440 V DC, for railway applications.","salesMarkdown":"## Temperature derating — the real current rating The 20 A rating is at 35 °C ambient. In a warm enclosure — say 50 °C — it derates to 17.7 A. At 60 °C it's 16.42 A. If you're sizing this for a hot railway cabinet near traction equipment, use the 50 °C or 55 °C column, not the headline number. The breaker also has a humidity limit: max 95% RH up to 55 °C, dropping to 35% RH at 75 °C. It's 36 mm wide (2 modular width units), 76 mm deep, and installs in any orientation. Both top and bottom accept combined terminals, and it's IP20 with conductors connected — fine for a closed panel, not for wet locations.","metaTitle":"Siemens 5SY5220-7CC12 SENTRON MCB, 2P C-Curve 20A DC, 440V","metaDescription":"Siemens 5SY5220-7CC12 SENTRON miniature circuit breaker, 2-pole, C characteristic, 20 A at 35 °C, rated DC 440 V. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY5220-7CC12","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"MCB 5SY5 CRH 440V DC 10KA 2P C20","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","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 DC / rated value":"440 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"20 A","at 40 °C / rated value":"18.88 A","at 45 °C / rated value":"18.3 A","at 50 °C / rated value":"17.7 A","at 55 °C / rated value":"17.06 A","at 60 °C / rated value":"16.42 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Railway","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Consider polarity","Product Feature / Touch Protection":"Yes","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":"DC","vibration resistance / acc. to IEC 60068-2-6":"50 m/s² at 25 to 150 Hz","Product Component / Neutral Conductor Switching":"No","operating voltage / at DC / rated value / maximum":"500 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/064775891fb491d287af482e94b2a388.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1265778&mlfb=5SY5220-7CC12"},"ai":{"faq":[{"question":"What is the closest functional second-source for 5SY5220-7CC12?","answer":"The 5SY5240-7 is a higher-current sibling in the same SENTRON railway DC series. It shares the same 2-pole C-curve footprint and voltage rating, so it drops into the same panel without rewiring — just check your load current against its rating."},{"question":"What compliance documentation does this brand provide for 5SY5220-7CC12?","answer":"The breaker is halogen-free and silicon-free, and designed per railway standards. Standard Siemens SENTRON documentation includes the declaration of conformity and product certificate; check the manufacturer portal for the specific IEC/EN 60947-2 railway variant sheets."},{"question":"How do I get current pricing and availability for 5SY5220-7CC12?","answer":"Submit an RFQ through this listing. The part is sourced to order via independent distribution, and availability with current pricing is confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5220-7CC12","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/5SY5220-7CC12 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}}