{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8550-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8550-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8550-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8550-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8550-7, miniature circuit breaker, C-curve, 1P+N, 25 kA interrupting capacity at 230 V AC per IEC 60947-2, 2 MW units wide.","salesMarkdown":"## Siemens 5SY8550-7 — SENTRON MCB, C-Curve, 1P+N, 25 kA It is rated for 25 kA breaking capacity at 230 V AC per IEC 60947-2, and 15 kA at 60 V DC per the same standard. For UL 1077 recognition, the interrupting rating is 5 kA. ## Breaking capacity and selectivity — what the ratings mean For a panel designer, that figure governs the upstream fuse or breaker coordination — you need a device with equal or higher breaking capacity ahead of it to maintain selectivity. The 15 kA DC rating at 60 V applies to battery-backed or DC bus circuits, common in industrial control panels. ## Mounting, environment, and accessories Snap-on mounting to DIN rail, any position. Operating temperature range spans -40 °C to 75 °C, with humidity derating above 55 °C (max 95% RH at 55 °C, dropping to 35% at 75 °C). Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.","metaTitle":"Siemens 5SY8550-7 SENTRON MCB, C-Curve, 1P+N, 25 kA IEC","metaDescription":"Siemens 5SY8550-7 SENTRON miniature circuit breaker, C-curve, 1P+N, 25 kA at 230 V AC per IEC 60947-2. Current lifecycle. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 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":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"230 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":"Yes","Number Of Modular Width Units":"2","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 single-phase operation at AC rated value":"250 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/146e69483e6e639da7b6e628a47465eb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=431328&mlfb=5SY8550-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8550-7/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY8550-7?","answer":"The 5SY8550-7 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 5SY8550-7?","answer":"The 5SY8550-7 is designed to IEC / EN 60947-2 and UL 1077 standards. The housing is halogen-free and silicon-free. For specific RoHS, REACH, or other compliance declarations, the manufacturer's documentation is available on request."},{"question":"What is 5SY8550-7's depth and width for panel planning?","answer":"The 5SY8550-7 has a depth of 76 mm and a width of 36 mm (2 modular units). Installation depth is 70 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8550-7","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/5SY8550-7 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}}