{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6203-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6203-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6203-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6203-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6203-8CC miniature circuit breaker (MCB), D-curve, 2-pole, 3 A rated at 400 V AC, 6 kA breaking capacity per EN 60898, 5 kA per UL 1077/CSA C22.2 No. 235.","salesMarkdown":"Its D-curve tripping characteristic is sized for loads with high inrush — think motor starters, small transformers, or solenoid banks — where a B- or C-curve would nuisance-trip on startup. Rated 3 A at 400 V AC, it breaks 6 kA per EN 60898 and 5 kA per UL 1077 / CSA C22.2 No. 235, so it clears a fault cleanly before an upstream device has to act. The 2-pole form switches both line conductors, but note it does not switch the neutral — that's a separate terminal bar or an additional pole if your circuit needs it. A C-curve (5-10x) would trip sooner; a D-curve gives you that extra headroom. For a 3 A rating, that's a deliberate choice: you're protecting a circuit that pulls 3 A steady but sees a short spike on start. If your available fault current is higher, you'll need a current-limiting upstream breaker. The UL 1077 / CSA 5 kA rating covers North American installations; the breaker carries both marks, so it's accepted on both sides of the Atlantic. Depth is 76 mm, height 90 mm. Both top and bottom terminals are combined, accepting a range of conductor sizes. The breaker is sealable for applications where you need to lock the handle position after commissioning.","metaTitle":"Siemens SENTRON 5SY6203-8CC Miniature Circuit Breaker, D-Cur","metaDescription":"Siemens SENTRON 5SY6203-8CC miniature circuit breaker (MCB), D-curve, 3 A rated at 400 V AC, 6 kA breaking capacity per EN 60898. UL/CSA 5 kA. Current production. Order against RFQ","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":"5SY6203-8CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 6kA, 2-pole, D, 3 A","Halogen-Free":"Yes","Silicon-Free":"Yes","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","Degree of pollution":"3","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":"5SY6CC","Suitability for operation":"Mechanical engineering / industry","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","Product feature / Touch protection":"Yes","Operating current / at AC / rated value":"3 A","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/010c3c67dfef91605b5f4b502f26af2b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=249394&mlfb=5SY6203-8CC"},"ai":{"faq":[{"question":"How do I get current pricing and availability for the 5SY6203-8CC?","answer":"Pricing and stock are confirmed at quote time against an RFQ through independent distribution. Submit an RFQ for a current, binding quote."},{"question":"What is the closest functional second-source for the 5SY6203-8CC?","answer":"Within the same SENTRON family, the 5SY7140-8CC is a higher-current variant but shares the same 2-pole D-curve footprint. It will drop into the same DIN-rail position, but verify the load current — the 5SY6203-8CC is rated 3 A, while the 5SY7140-8CC is a different rating. Do not substitute without checking the circuit's ampacity."},{"question":"What compliance documentation does the 5SY6203-8CC carry?","answer":"The breaker is certified to EN 60898 (6 kA), UL 1077, and CSA C22.2 No. 235 (5 kA). It is halogen-free and silicon-free. Standard RoHS and REACH declarations are available from the manufacturer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6203-8CC","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/5SY6203-8CC 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}}