{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8103-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8103-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8103-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8103-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8103-7, miniature circuit breaker, 1-pole, C characteristic, 3 A rated, 50 kA breaking capacity per IEC 60947-2, 440 V AC, IP20.","salesMarkdown":"The 50 kA breaking capacity at 400 V per IEC 60947-2 is the headline number here: it safely interrupts a fault current up to 50,000 A without welding or exploding, which is essential for high-fault panels downstream of large transformers. At DC (72 V max) it still breaks 15 kA, so it works in DC control circuits too. ## Thermal derating and environment Rated 3 A at 45 °C ambient. At 50 °C it derates to 2.91 A; at 55 °C to 2.81 A. The 5SY8103-7 carries the standard SENTRON compliance package: halogen-free and silicon-free construction, sealable for tamper-proofing, and designed per IEC 60947-2 with a 50 kA rated short-circuit capacity. It's marked for mechanical engineering / industry use per the manufacturer's suitability listing.","metaTitle":"Siemens 5SY8103-7 SENTRON MCB, C-Char 3A 1P 50kA","metaDescription":"Siemens 5SY8103-7 SENTRON miniature circuit breaker, 1-pole C-curve 3 A, 50 kA breaking capacity per IEC 60947-2. Active production, sourced to order. Depth 76 mm, width 18 mm, IP2","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SY8103-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400 V D=70 mm 25 kA according to EN 60947-2, 1P, C3","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"3 A","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","at 45 °C rated value":"3 A","at 50 °C rated value":"2.91 A","at 55 °C rated value":"2.81 A","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to IEC 60947-2 rated value":"50 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","at DC according to IEC 60947-2 rated value":"15 kA","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 (Switching Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7fefd027597067f5db8386cfe70cf62d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=410582&mlfb=5SY8103-7"},"ai":{"faq":[{"question":"Where can I buy 5SY8103-7 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is 5SY8103-7's breaking capacity?","answer":"50 kA at 400 V AC per IEC 60947-2, and 15 kA at 72 V DC per the same standard. That's the short-circuit rating that determines whether this MCB coordinates with upstream protection."},{"question":"Will 5SY8103-7 drop into a panel specified around 5SY4104-7CV?","answer":"Both are 1-pole SENTRON MCBs with the same 18 mm width and DIN-rail mounting, so the mechanical fit is identical. The difference is electrical: 5SY8103-7 is a 3 A C-curve with 50 kA breaking capacity, while 5SY4104-7CV is a different rating. Verify the load current and fault level before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8103-7","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/5SY8103-7 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}}