{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4103-7KK11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4103-7KK11","canonicalUrl":"https://aoctrl.com/siemens/5SY4103-7KK11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4103-7KK11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4103-7KK11, 1-pole miniature circuit breaker, C characteristic, 3 A rated current, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity, IP20, halogen-free, for railway applications.","salesMarkdown":"The C-curve (tripping characteristic class C) means the breaker holds 5–10× rated current for short periods before tripping magnetically — typical for motor-starter and lighting circuits where inrush is moderate. At 3 A rated current, it is sized for small loads: control transformers, contactor coils, or single-phase auxiliary circuits drawing under 2.4 A continuous at 40 °C ambient (the derated value at 40 °C is 2.82 A). ## Temperature derating — don't ignore it This breaker carries a full temperature-derating table from the factory. At 35 °C it holds the full 3 A; at 40 °C it drops to 2.82 A; at 45 °C to 2.72 A; at 50 °C to 2.62 A; at 55 °C to 2.52 A; at 60 °C to 2.41 A. Mounting position is unrestricted — horizontal, vertical, or inverted all within spec. The combined terminal at top and bottom accepts both busbar and conductor connections without re-termination. ## Construction and compliance notes Halogen-free and silicon-free construction, with sealable terminals and touch protection. Designed for railway applications per the product designation, so it meets the vibration and environmental endurance typical of EN 50155-derived requirements. The energy limitation class is 3, which limits let-through energy in a fault event.","metaTitle":"Siemens 5SY4103-7KK11 SENTRON MCB, 1P C-curve 3A, 10/35kA","metaDescription":"Siemens SENTRON 5SY4103-7KK11 miniature circuit breaker, 1-pole C-curve 3 A, 10 kA (EN 60898) / 35 kA (IEC 60947-2). Active production, sourced to order. IP20, halogen-free, railwa","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"1","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"3 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","Number Of Poles / Note":"1P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"3 A","at 40 °C / rated value":"2.82 A","at 45 °C / rated value":"2.72 A","at 50 °C / rated value":"2.62 A","at 55 °C / rated value":"2.52 A","at 60 °C / rated value":"2.41 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"35 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","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","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=288070&mlfb=5SY4103-7KK11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4103-7KK11/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4103-7KK11?","answer":"10 kA per EN 60898 and 35 kA per IEC 60947-2. The higher 35 kA rating applies when the breaker is used under IEC 60947-2 conditions, typically in industrial distribution where fault currents are larger."},{"question":"What is the temperature derating for this breaker?","answer":"At 40 °C the rated current derates to 2.82 A; at 50 °C to 2.62 A; at 60 °C to 2.41 A. The full derating curve is published from 35 °C to 60 °C."},{"question":"Where can I buy 5SY4103-7KK11?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 5SY4103-7KK11 drop into a panel specified around 5SY4101-7CV?","answer":"Both are 1-pole SENTRON MCBs with the same 18 mm width and DIN-rail mounting, so mechanical fit is identical. The difference is rating: 5SY4103-7KK11 is 3 A C-curve; 5SY4101-7CV is a different current rating. Verify the load current before swapping."},{"question":"What compliance documentation does Siemens provide for 5SY4103-7KK11?","answer":"The breaker carries EN 60898 and IEC 60947-2 ratings on the nameplate. It is halogen-free and silicon-free, which supports RoHS and REACH compliance declarations. The railway-design designation implies conformity with railway environmental standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4103-7KK11","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/5SY4103-7KK11 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}