{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4103-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4103-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4103-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4103-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4103-7, 1-pole miniature circuit breaker, C characteristic, 10 kA (EN 60898) / 35 kA (IEC 60947-2), 400 V AC, 18 mm wide.","salesMarkdown":"## Siemens 5SY4103-7 — SENTRON 1-pole MCB, C-curve, 10/35 kA It carries a C tripping characteristic, meaning it is designed for moderate inrush currents — typical for motor control circuits, lighting banks, and general industrial loads where the start-up surge is higher than a resistive load but not extreme. Rated for 400 V AC (single- or multi-phase) and up to 72 V DC, it offers a breaking capacity of 10 kA per EN 60898-1 and 35 kA per IEC 60947-2 — the higher figure applies when the MCB is used in industrial distribution where fault currents can be severe. Under UL 1077 / CSA C22.2 No.235, the rating is 5 kA. Width is 18 mm (one modular unit), depth 76 mm, height 90 mm. The neutral conductor is not switched (single-pole design). Sealable for lockout/tagout compliance. Operating temperature range is -40 °C to 75 °C, with humidity derating: max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C. Halogen-free and silicon-free construction. Energy limitation class 3. Approvals include IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No.235 — covering both IEC and North American standards. The dual rating means the same part can be specified for export panels or multi-standard projects without a separate UL version.","metaTitle":"Siemens 5SY4103-7 SENTRON MCB, 1P C-Char, 10kA/35kA, 400V AC","metaDescription":"Siemens 5SY4103-7 SENTRON miniature circuit breaker, 1-pole C-curve, 10 kA per EN 60898, 35 kA per IEC 60947-2, 400 V AC. Current production. Quoted to order.","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","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","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":"400 V","at DC rated value":"60 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":"1","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"35 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 (Operating 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":"$12.19","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=165002&mlfb=5SY4103-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4103-7/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 5SY4103-7 and 5SY4140-7?","answer":"Both are 1-pole SENTRON MCBs with the same C-curve and 18 mm width. The 5SY4140-7 is a higher-rated variant (typically 40 A vs the 5SY4103-7's rating). The physical footprint and terminal layout are identical, so it drops into the same panel without rewiring — just verify the ampacity matches your circuit."},{"question":"What compliance documentation does Siemens provide for 5SY4103-7?","answer":"The MCB carries IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No.235 approvals. It is halogen-free and silicon-free. RoHS and REACH declarations are standard with the franchise shipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4103-7","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/5SY4103-7 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}}