{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7105-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7105-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7105-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7105-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7105-8, 1-pole miniature circuit breaker, D tripping characteristic, 0.5 A rated current, 15 kA (EN 60898) / 50 kA (IEC 60947-2) breaking capacity, 400 V AC, 18 mm wide.","salesMarkdown":"Rated 0.5 A at 35 °C and 400 V AC, it snaps onto a standard DIN rail and takes up just one modular width (18 mm). The 18 mm width and 76 mm depth let it fit tight panel layouts without crowding adjacent breakers or terminal blocks. Mounting position is unrestricted — lay it flat, vertical, or upside-down; the arc chamber works the same. ## Breaking capacity — what the two ratings mean This breaker carries two breaking-capacity numbers because it's certified under two different standards. For DC circuits, the IEC 60947-2 rating drops to 15 kA — still respectable for battery banks or DC bus protection in drives.","metaTitle":"Siemens 5SY7105-8 SENTRON MCB, 1P, D-curve, 0.5 A, 15 kA","metaDescription":"Siemens 5SY7105-8 SENTRON miniature circuit breaker, 1-pole, D tripping characteristic, 0.5 A rated at 35 °C, 15 kA breaking capacity per EN 60898, 50 kA per IEC 60947-2. Active pr","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","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":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"1P","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"0.5 A","at 45 °C / rated value":"0.45 A","at 50 °C / rated value":"0.44 A","at 55 °C / rated value":"0.42 A","at 60 °C / rated value":"0.4 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"50 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=162488&mlfb=5SY7105-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7105-8/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY7105-8?","answer":"The 5SY7105-8 has a 15 kA breaking capacity per EN 60898 and a 50 kA breaking capacity per IEC 60947-2, both at 400 V AC. For DC circuits it is rated 15 kA per IEC 60947-2."},{"question":"Where can I buy the 5SY7105-8 and get current pricing?","answer":"The 5SY7105-8 is 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 price and lead time."},{"question":"Will the 5SY7105-8 drop into a panel specified for the 5SY3132-6?","answer":"Both are 1-pole SENTRON MCBs with the same 18 mm width and DIN-rail mounting, so the 5SY7105-8 fits the same panel footprint. The key difference is the tripping curve and current rating — the 5SY3132-6 is a different characteristic and amp rating, so verify coordination and load requirements before swapping."},{"question":"What compliance documentation does Siemens provide for the 5SY7105-8?","answer":"The 5SY7105-8 is certified under EN 60898 and IEC 60947-2. It carries pollution degree 3, overvoltage category III, and is rated for 50/60 Hz supply. The housing is halogen-free and silicon-free. Specific RoHS, REACH, and UL documentation is available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7105-8","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/5SY7105-8 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}}