{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6303-6CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6303-6CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6303-6CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6303-6CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6 series, 5SY6303-6CC miniature circuit breaker, 3-pole, B-curve, 3 A rated current, 6 kA breaking capacity at 400 V AC per EN 60898.","salesMarkdown":"The B-curve (3-5x In) means it trips fast on short circuits but tolerates modest inrush — fine for resistive loads and general-purpose lighting, less suited for motor starting where a C or D curve would be the better call. The 54 mm width (3 width units at 18 mm each) and 76 mm depth leave room for adjacent breakers and busbar combing in a crowded enclosure. IP20 with connected conductors — fine for a closed panel, not for washdown areas. Mounting position is unrestricted, which helps when you're squeezing it into a tight corner of a control cabinet. Vibration resistance per IEC 60068-2-6 (±1 mm at 5-25 Hz, 50 m/s² at 25-150 Hz) covers typical machine-mounted applications.","metaTitle":"Siemens 5SY6303-6CC SENTRON MCB, 3A B-Curve 3P 6kA","metaDescription":"Siemens 5SY6303-6CC SENTRON miniature circuit breaker, 3-pole, B-curve, 3 A rated at 400 V AC, 6 kA breaking capacity per EN 60898. Current lifecycle stage, sourced to order agains","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY6303-6CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 6kA, 3-pole, B, 3 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting Type":"Quick assembly system","Number Of Poles":"3","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":"3","Number Of Poles / Note":"3P","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":"B","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","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","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/03617955ed78a1a22e155e9248e9dcb2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=441622&mlfb=5SY6303-6CC"},"ai":{"faq":[{"question":"What is the 5SY6303-6CC used for?","answer":"It's a 3-pole B-curve miniature circuit breaker rated 3 A at 400 V AC, 6 kA breaking capacity per EN 60898. Used for branch-circuit protection in industrial control panels, distribution boards, and machinery — primarily for resistive or lighting loads where the B-curve's 3-5x In trip threshold is appropriate."},{"question":"Where can I buy 5SY6303-6CC?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery requirements."},{"question":"Will 5SY6303-6CC drop into a panel specified around 5SY3132-6?","answer":"Both are 3-pole SENTRON MCBs on the same DIN-rail footprint with identical width (54 mm / 3 width units). The 5SY6303-6CC is a 3 A B-curve; the 5SY3132-6 is a different rating and characteristic in the same mechanical format. No rewiring needed for the mounting, but verify the current rating and trip curve match your circuit protection requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6303-6CC","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/5SY6303-6CC 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}}