{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY3105-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY3105-7","canonicalUrl":"https://aoctrl.com/siemens/5SY3105-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY3105-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY3 series, miniature circuit breaker, 1-pole C-curve 0.5 A, 4.5 kA (EN 60898) / 6 kA (IEC 60947-2), 400 V AC, 18 mm width, IP20.","salesMarkdown":"The Siemens 5SY3105-7 is a 1-pole SENTRON miniature circuit breaker with a C-curve trip characteristic rated at 0.5 A at 400 V AC. At 0.5 A it is sized for control transformers, signal circuits, or very small auxiliary loads, not main power distribution. Breaking capacity is rated at 4.5 kA per EN 60898 and 6 kA per IEC 60947-2. Either way, this breaker is meant for low-fault installations — if your panel's SCCR exceeds 6 kA at 400 V, step up to a higher-rated frame. For DC circuits the maximum rated voltage is 72 V, with a DC breaking capacity of 15 kA per IEC 60947-2. That makes it usable in 48 V or 60 V DC control buses, telecom rectifier outputs, or battery-backed auxiliary supplies — but not for 110 V DC traction battery strings. The breaker carries a UL 1077 and CSA C22.2 No. 235 supplementary protection rating at 5 kA / 400 V AC. That means it is recognized as a supplementary protector in North American panels — not a branch-circuit rated breaker per UL 489, so it must be backed by a listed branch-circuit OCPD upstream. Width is 18 mm — one modular unit (1 MW) on a standard DIN rail. The quick-assembly mounting system snaps onto the rail without tools. That is unusually wide for a 0.5 A breaker — it lets you land larger incoming tails or loop through a busbar while the protection element stays small. Both top and bottom terminals are combined (line/load reversible), and the terminals are touch-protected per IP20 with conductors connected. The breaker is sealable, halogen-free, and silicon-free — relevant for food-processing, pharmaceutical, or clean-room panels where outgassing or tamper evidence matters.","metaTitle":"Siemens 5SY3105-7 SENTRON MCB, 1P C 0.5 A, 4.5 kA","metaDescription":"Siemens SENTRON 5SY3105-7 miniature circuit breaker, 1-pole C-curve 0.5 A, 4.5 kA per EN 60898, 6 kA per IEC 60947-2. Current lifecycle stage. Sourced to order against RFQ.","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","Energy limiting class":"3","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":"5SY3","Current / at AC / rated value":"0.5 A","Tripping characteristic class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"4.5 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"6 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":"250 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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=387583&mlfb=5SY3105-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY3105-7/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY3105-7","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/5SY3105-7 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}}