{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4203-6CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4203-6CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4203-6CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4203-6CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4203-6CC, miniature circuit breaker, 2-pole, B-curve, 3 A rated current at 400 V AC, 10 kA breaking capacity (EN 60898), 5 kA (UL 1077), IP20 with conductors, 36 x 90 x 76 mm.","salesMarkdown":"The Siemens SENTRON 5SY4203-6CC is a 2-pole miniature circuit breaker with a B-curve trip characteristic, rated at 3 A and 400 V AC. Its 10 kA breaking capacity per EN 60898 covers most commercial and light industrial fault levels; the UL 1077 listing at 5 kA extends its use into North American panel builds. The 2-pole version switches both phase conductors, with no neutral switching built in. Operating temperature range spans -40 °C to 75 °C, with humidity derating above 55 °C. Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz — suitable for machine-mounted enclosures. ## Integration Notes The sealable design supports anti-tamper requirements in metered or shared-access panels.","metaTitle":"Siemens SENTRON 5SY4203-6CC MCB, 2P, B-Curve, 3 A, 400 V, 10","metaDescription":"Siemens SENTRON 5SY4203-6CC miniature circuit breaker, 2-pole, B-curve, 3 A rated at 400 V AC, 10 kA breaking capacity per EN 60898, UL 1077 5 kA. Current production, available to","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":"5SY4203-6CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 2-pole, B, 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","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limiting Class":"3","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","Tripping Characteristic Class":"B","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","supply voltage / at AC / rated value":"400 V","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","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","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/e0baf4bbc17366a25516acb71c6c403e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=63877&mlfb=5SY4203-6CC"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY4203-6CC?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time — the 3 A B-curve 2-pole variant is a less common line item, so availability is verified per request rather than published as a static figure."},{"question":"What is the closest functional alternative to 5SY4203-6CC — for example, 5SY3132-6?","answer":"The 5SY3132-6 is a 1-pole B-curve 32 A breaker — different pole count and rating entirely. For a 2-pole 3 A B-curve, the 5SY4203-6CC is the correct order code within the SENTRON 5SY4 series. No direct drop-in second source exists; the 5SY4 family shares the same 36 mm per-pole width and DIN-rail mount, so a 2-pole unit from the same series is the only form-fit-functional match."},{"question":"What compliance documentation does Siemens provide for 5SY4203-6CC?","answer":"The breaker carries EN 60898 (10 kA) and UL 1077 / CSA C22.2 No.235 (5 kA) certifications. It is halogen-free and silicon-free. Standard Siemens documentation includes CE declaration of conformity and, on request, the UL/CSA file number for panel acceptance."},{"question":"Will 5SY4203-6CC drop into a panel specified around 5SY3132-6 without rewiring?","answer":"No — the 5SY3132-6 is a 1-pole breaker, while the 5SY4203-6CC is 2-pole. The DIN-rail footprint and per-pole width (36 mm) are the same, but the 2-pole unit occupies 2 width units instead of 1, and the wiring scheme differs (switched phase vs. both phases). Panel layout and busbar arrangement would need adjustment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4203-6CC","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/5SY4203-6CC 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}}