{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6105-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6105-8","canonicalUrl":"https://aoctrl.com/siemens/5SY6105-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6105-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6 series, miniature circuit breaker, 1-pole, 0.5 A rated current, D tripping characteristic, 6 kA breaking capacity per EN 60898, 30 kA per IEC 60947-2, 400 V AC, IP20, 18 mm width.","salesMarkdown":"## What this 0.5 A D-curve MCB is for The Siemens 5SY6105-8 is a 1-pole miniature circuit breaker from the SENTRON 5SY6 series, rated 0.5 A at 400 V AC with a D tripping characteristic. The 0.5 A rating is a low-current branch; you'd see it protecting a control transformer primary or a small power supply, not a main feeder. At 0.5 A, the let-through energy is low, so selectivity with a larger upstream MCB or fuse is generally easy to achieve — but verify the I²t coordination curves if you're stacking multiple 5SY6 breakers downstream of a single feeder. Single width unit at 18 mm, so it takes one DIN-rail slot. Depth is 76 mm, height 90 mm — standard 5SY6 footprint. Combined top and bottom terminals mean you can feed from either direction without a special busbar. IP20 with conductors connected — no washdown rating, keep it inside the enclosure. ## Approvals and documentation Rated per EN 60898 and IEC 60947-2, with a UL 1077 / CSA C22.2 No. 235 listing at 5 kA for the North American market. Touch protection is built into the terminals. Sealable design allows lockout/tagout. Compliance documentation (CE, UKCA, EAC) is standard with the series; RoHS and REACH declarations are available from Siemens.","metaTitle":"Siemens 5SY6105-8 SENTRON MCB, 1P, 0.5 A, D Curve","metaDescription":"Siemens 5SY6105-8 SENTRON miniature circuit breaker, 1-pole, 0.5 A, D tripping characteristic, 6 kA (EN 60898) / 30 kA (IEC 60947-2). Current lifecycle. Sourced to order against RF","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"18 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"1","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"1","Number of poles / Note":"1P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY6","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"0.5 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"30 kA","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","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","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in","AWG number / as coded connectable conductor cross section":"18 ... 4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$29.21","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=59151&mlfb=5SY6105-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6105-8/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY6105-8?","answer":"6 kA per EN 60898 and 30 kA per IEC 60947-2 at 400 V AC. For DC applications, the breaking capacity is 15 kA per IEC 60947-2, with a maximum DC voltage of 72 V."},{"question":"Will the 5SY6105-8 fit in a panel designed for the 5SY6008-7?","answer":"Yes, mechanically it drops in — both are 18 mm wide, single-pole, same DIN-rail footprint and terminal layout. The difference is the electrical rating: the 5SY6105-8 is a 0.5 A D-curve; verify that matches your circuit protection requirements before swapping."},{"question":"Where can I buy the 5SY6105-8 and how is it quoted?","answer":"Sourced through independent industrial distribution. Quoted to order against an RFQ — availability and current pricing are confirmed at quote time. No minimums beyond the manufacturer's standard pack quantity."},{"question":"What compliance documentation is available for the 5SY6105-8?","answer":"The series carries CE, UKCA, and EAC marking. Rated per EN 60898 and IEC 60947-2, with UL 1077 / CSA C22.2 No. 235 listing at 5 kA. RoHS and REACH declarations are available from Siemens. The breaker is halogen-free and silicon-free."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6105-8","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/5SY6105-8 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}}