{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5203-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5203-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY5203-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5203-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY5203-7CC, 2-pole, C-curve, 3 A, 440 VDC, 10 kA interrupting capacity per IEC 60947-2, 2 MW units wide.","salesMarkdown":"## DC-rated MCB for 440 VDC circuits — 2-pole C-curve at 3 A The Siemens SENTRON 5SY5203-7CC is a 2-pole miniature circuit breaker rated for DC circuits up to 440 V with a 10 kA interrupting capacity per IEC 60947-2. The C-curve (tripping characteristic class C) means it handles moderate inrush currents — typical for motor control, solenoid valves, or DC power supplies — without nuisance trips, while still clearing short circuits fast. At 3 A it protects downstream wiring and loads on a 440 VDC bus, common in photovoltaic arrays, battery banks, or industrial DC drives. The 2-pole design switches both conductors, which is required for DC circuits where polarity matters (the evidence notes polarity consideration). The C-curve trips between 5× and 10× rated current, so a 3 A breaker holds through a 15–30 A inrush before opening on overload. Halogen-free and silicon-free construction avoids corrosive off-gassing in sealed enclosures. 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 panels. The sealable design allows lockout/tagout for maintenance isolation.","metaTitle":"Siemens 5SY5203-7CC SENTRON MCB, 2-Pole C 3A, 440 VDC 10 kA","metaDescription":"Siemens SENTRON 5SY5203-7CC miniature circuit breaker, 2-pole, C-curve, 3 A, 440 VDC, 10 kA per IEC 60947-2. Active production. Quoted to 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":"5SY5203-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 440 V DC 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 DC rated value":"440 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","Design Of The Product":"Machine manufacture / industry","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":"Consider polarity","Tripping Characteristic Class":"C","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":"DC","at DC according to IEC 60947-2 rated value":"10 kA","operating voltage at DC rated value maximum":"500 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Extension Installable Supplementary Devices":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4a2402eef24c89b81bc1960561fa4ffd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=122344&mlfb=5SY5203-7CC"},"ai":{"faq":[{"question":"What is the interrupting capacity of 5SY5203-7CC at 440 VDC?","answer":"10 kA per IEC 60947-2 at 440 VDC. That is the maximum fault current this breaker can safely clear at that voltage."},{"question":"Where can I buy 5SY5203-7CC?","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 commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5203-7CC","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/5SY5203-7CC 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}}