{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8350-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8350-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8350-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8350-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8 series, 3-pole miniature circuit breaker, C-curve, 25 kA IEC 60947-2 / 5 kA UL 1077, 400 V AC, 60 V DC.","salesMarkdown":"It's rated to interrupt 25 kA at 400 V AC per IEC 60947-2 and 5 kA per UL 1077 — dual-rated, so it can be specified for panels built to either standard. The 54 mm width (3 modular units) and 76 mm depth fit standard DIN-rail enclosures without crowding adjacent devices. ## Breaking capacity and what it means for your panel That's typical for a main or feeder breaker in a distribution board. The 5 kA UL 1077 rating is lower because UL 1077 is a supplementary protector standard, not a branch-circuit OCPD; in North American practice, this part is used as a supplementary protector downstream of a branch-circuit fuse or breaker. The 15 kA DC rating at 60 V DC (IEC 60947-2) covers DC bus or battery circuits — useful if you're feeding a DC drive link or control power supply. ## Mounting and environmental considerations Operating range is -40 °C to 75 °C, with humidity derating above 55 °C (95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C). The sealable option (padlockable toggle) is useful for lockout/tagout on a panel door. ## Compliance documentation Rated to IEC / EN 60947-2 and UL 1077. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.","metaTitle":"Siemens 5SY8350-7 SENTRON MCB, 3P C-Curve, 25kA IEC","metaDescription":"Siemens SENTRON 5SY8350-7 miniature circuit breaker, 3-pole C-curve, 25 kA IEC 60947-2 / 5 kA UL 1077. Current production, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","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","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to IEC 60947-2 rated value":"25 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":"3.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/312cf466a1d946b95985c4d3f3bd320e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=181196&mlfb=5SY8350-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8350-7/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 5SY8350-7?","answer":"The breaker is certified to IEC/EN 60947-2 and UL 1077. It is halogen-free and silicon-free, and vibration-tested per IEC 60068-2-6. RoHS and REACH declarations are standard for current-production Siemens SENTRON parts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8350-7","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/5SY8350-7 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}}