{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4105-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4105-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4105-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4105-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4105-5 miniature circuit breaker, 1-pole, Characteristic A, 10 kA per EN 60898-1 / 35 kA per IEC 60947-2, 400 V AC, 18 mm wide.","salesMarkdown":"That's the key fit condition: this breaker goes in a DC-bus or solid-state load circuit, not a general-purpose motor branch (where you'd use C or D curve). Breaking capacity is dual-rated: 10 kA per EN 60898-1 and 35 kA per IEC 60947-2. For a 400 V AC industrial panel with a transformer upstream, the 35 kA rating is what you size against. The IP20 rating applies with conductors connected — standard for inside a closed panel, no washdown exposure. Approvals include IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No. 235 — meaning it passes acceptance for European distribution boards and North American industrial panels. The UL 1077 rating is 5 kA (supplementary protector), so for UL-listed panels the fault-current capability is lower than the IEC figure. ## Integration notes Mounting position any — no derating for horizontal or inverted orientation. Combined terminal at both top and bottom — accepts cable or busbar connection without swapping parts.","metaTitle":"Siemens 5SY4105-5 SENTRON MCB, 1P, Characteristic A, 10kA/35","metaDescription":"Siemens 5SY4105-5 SENTRON miniature circuit breaker, 1-pole, Characteristic A, rated 10 kA (EN 60898-1) / 35 kA (IEC 60947-2), 400 V AC. Active production, sourced to order. Quoted","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":"5SY4105-5","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 230/400 V 10kA, 1-pole, A, 0.5 A, D=70 mm","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","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","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":"A","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":"1.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$68.15","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3ef8382e041e0ae1d4d35312e67d0815.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=451962&mlfb=5SY4105-5"},"ai":{"faq":[{"question":"What is the closest functional second-source for 5SY4105-5?","answer":"Within the SENTRON family, the 5SY4140-7 is a higher-current variant (40 A vs. 5 A) with the same 1-pole form factor and Characteristic A curve. For a direct drop-in replacement at the same rating, stick with the 5SY4105-5; the 5SY4140-7 will not fit without rewiring if the load current differs."},{"question":"What compliance documentation does Siemens provide for 5SY4105-5?","answer":"The breaker 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/REACH declarations are standard with the SENTRON series."},{"question":"Where can I buy 5SY4105-5?","answer":"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/5SY4105-5","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/5SY4105-5 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}}