{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5403-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5403-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY5403-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5403-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5403-7CC, 4-pole miniature circuit breaker, C tripping characteristic, 3 A rated current at 35 °C, 10 kA DC breaking capacity per IEC 60947-2, 1 000 V DC max.","salesMarkdown":"## 4-pole C-curve MCB for DC circuits It is designed for DC applications up to 1 000 V and delivers a 10 kA breaking capacity per IEC 60947-2 at 880 V DC. The four poles switch all conductors simultaneously, with no neutral switching — polarity must be observed on supply connection. ## Temperature derating matters in a sealed panel The 3 A rating holds at 35 °C; at 40 °C it derates to 2.8 A, at 45 °C to 2.69 A, at 50 °C to 2.57 A, and at 55 °C to 2.46 A. In a sealed enclosure or high-ambient machine cabinet, use the 40 °C or 50 °C column for sizing — the breaker will trip earlier if the ambient exceeds the rating point. The surrounding temperature influence curve is specified up to 75 °C with humidity constraints (95 % RH to 55 °C, tapering to 35 % RH at 75 °C). The quick-assembly system snaps onto the rail in any mounting position. IP20 protection applies only with connected conductors — the terminals are touch-protected per the product feature. Combined top and bottom terminals simplify daisy-chaining in a distribution board.","metaTitle":"Siemens 5SY5403-7CC SENTRON MCB, 4P C-curve 3A, 10kA DC","metaDescription":"Siemens SENTRON 5SY5403-7CC miniature circuit breaker, 4-pole C-curve rated 3A at 35°C, 10kA DC breaking capacity per IEC 60947-2. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY5403-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 880 V DC 10kA, 4-pole, C, 3 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","at DC / rated value":"880 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"II","Combined Terminal Top":"Yes","Design Of The Product":"Machine manufacture / industry","according to EN 61346-2":"F","at 35 °C / rated value":"3 A","at 40 °C / rated value":"2.8 A","at 45 °C / rated value":"2.69 A","at 50 °C / rated value":"2.57 A","at 55 °C / rated value":"2.46 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Consider polarity","Product Feature / Touch Protection":"Yes","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","Product Component / Neutral Conductor Switching":"No","operating voltage / at DC / rated value / maximum":"1 000 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c52135ad821f9274b9178881cdbbb7fd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=23760&mlfb=5SY5403-7CC"},"ai":{"faq":[{"question":"What is the DC breaking capacity of 5SY5403-7CC?","answer":"10 kA at 880 V DC per IEC 60947-2, with a maximum operating voltage of 1 000 V DC."},{"question":"Where can I buy 5SY5403-7CC and get current pricing?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5403-7CC","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/5SY5403-7CC 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}}