{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4220-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4220-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4220-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4220-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4 series, 5SY4220-8CC miniature circuit breaker, 2-pole, 20 A rated current, D tripping characteristic, 400 V AC, 10 kA breaking capacity per EN 60898.","salesMarkdown":"This means it's built for high inrush loads — motor circuits, transformers, welding equipment — where the D curve allows a short magnetic trip delay to pass starting currents without nuisance tripping. Rated 400 V AC with a 10 kA breaking capacity per EN 60898, and 5 kA per UL 1077 / CSA C22.2 No.235. ## D-curve selectivity and application The D tripping characteristic (10–20 × In magnetic release) is the key differentiator from a B or C curve MCB. For a 20 A breaker, the magnetic trip threshold sits between 200 A and 400 A. That headroom lets motor starters and soft-starts ride through their inrush without the breaker opening — something a B-curve (3–5 × In) cannot guarantee on a refrigerated compressor or a hydraulic pump start. Rated DC side up to 72 V maximum — relevant for control-circuit protection in mixed AC/DC panels where the same breaker type is used across the rail. ## Deployment and environmental Humidity derating applied: max 95% at 55 °C, tapering to 35% at 75 °C. Halogen-free and silicon-free construction — important for clean-room or sealed-panel environments where outgassing contaminates optics or contacts. Touch protection integrated. Sealable terminals available (yes) for tamper-proof installations in utility or metering applications.","metaTitle":"Siemens 5SY4220-8CC SENTRON MCB, 20 A, D Curve, 2-Pole, 10 k","metaDescription":"Siemens 5SY4220-8CC SENTRON miniature circuit breaker, 20 A, D tripping characteristic, 2-pole, 400 V AC, 10 kA IEC breaking capacity. Currently in 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","Solid":"0.75 ... 35 mm²","Width":"36 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Wertebereich":"-25 ... +55 °C","Mounting type":"Quick assembly system","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +75 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"2","Number of poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY4CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"20 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","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","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in"}},"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=48286&mlfb=5SY4220-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4220-8CC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4220-8CC and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing — no stock figures or prices are carried on this listing."},{"question":"What is the breaking capacity of 5SY4220-8CC?","answer":"10 kA per EN 60898 at 400 V AC, and 5 kA per UL 1077 / CSA C22.2 No.235. The 10 kA IEC rating governs short-circuit withstand for most European panel designs."},{"question":"What wire sizes does the 5SY4220-8CC accept?","answer":"Solid or stranded conductors from 0.75 mm² up to 35 mm². The combined top and bottom terminals accept the same range, with a tightening torque of 2.5–3.5 N·m."},{"question":"What compliance documentation is available for 5SY4220-8CC?","answer":"The breaker carries IEC EN 60898 ratings (10 kA), UL 1077 and CSA C22.2 No.235 recognition (5 kA), and is halogen-free and silicon-free. Standard RoHS/REACH declarations are provided with the shipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4220-8CC","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/5SY4220-8CC 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}}