{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4203-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4203-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4203-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4203-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4203-7CC, 2-pole miniature circuit breaker, C-curve tripping characteristic, 10 kA breaking capacity per EN 60898, 36 mm width, 76 mm depth.","salesMarkdown":"## What the ratings mean for fit The 5SY4203-7CC: The 10 kA breaking capacity per EN 60898 at 400 V AC means this MCB can safely interrupt fault currents up to 10,000 A in a 400 V AC circuit — standard for branch-circuit protection in industrial control panels. The C-curve (trips at 5–10× rated current) is sized for moderate inrush loads like small motors or transformers, not purely resistive circuits. The 2-pole design switches both line conductors simultaneously; there's no neutral switching, so it's for line-to-line loads or two-phase distribution. At 36 mm wide (2 MW), it fits standard DIN-rail enclosures with predictable fill factor. Depth of 76 mm means it clears most 80 mm deep enclosures — check gland plate clearance if back-panel wiring is tight. Mounting position is any, so it works in horizontal or vertical panel layouts without derating. ## Integration notes Mounts on a DIN rail via the quick assembly system — snaps on and off without tools. The combined terminal top and bottom accept copper conductors; the sealable design allows lockout/tagout for maintenance isolation. The IP20 rating (with connected conductors) is standard for enclosed panel use — not for wet or washdown areas. Rated for overvoltage category III and pollution degree 3, so it's suited for fixed installations in industrial environments where transient overvoltages and conductive dust are expected. Vibration resistance per IEC 60068-2-6 covers typical machine-mounted panels.","metaTitle":"Siemens 5SY4203-7CC SENTRON MCB, 2-Pole C-Curve, 10 kA","metaDescription":"Siemens 5SY4203-7CC SENTRON 2-pole miniature circuit breaker, C-curve, 10 kA per EN 60898. 36 mm wide, 76 mm deep. Active production, sourced to order. Request quote.","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":"5SY4203-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 2-pole, C, 3 A","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","at AC rated value":"400 V","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 Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"10 kA","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":"AC","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0390cad913ab510e209e8e427f869599.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=45288&mlfb=5SY4203-7CC"},"ai":{"faq":[{"question":"Where can I buy 5SY4203-7CC and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the breaking capacity of 5SY4203-7CC?","answer":"The breaking capacity is 10 kA per EN 60898 at 400 V AC, and 5 kA per UL 1077 and CSA C22.2 No.235."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4203-7CC","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/5SY4203-7CC 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}}