{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8525-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8525-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8525-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8525-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8525-8 miniature circuit breaker, 2-pole (1P+N), D tripping characteristic, 25 A rated current at 45 °C, 30 kA breaking capacity per IEC 60947-2, 230 V AC, 50/60 Hz.","salesMarkdown":"That matters for installations where the neutral must be positively isolated under fault or during maintenance. Rated 25 A at 45 °C ambient, 230 V AC, 50/60 Hz, with a D tripping characteristic designed for high inrush loads like motor starters, transformers, or capacitor banks. For DC circuits it is rated 15 kA per the same standard. If you are specifying for a UL 508A panel, note the UL 1077 / CSA C22.2 No. 235 rating is 5 kA; that is the listing for supplementary protection in North American industrial control panels, not branch-circuit protection. Snaps onto a DIN rail (EN 60715) — the fastening method is a quick-assembly system, no tools needed for installation or removal. Halogen-free and silicon-free construction means the plastic housing does not emit corrosive halogen gases or silicone vapors under fire or thermal stress, important for clean environments like food processing or electronics assembly. Compliance documentation available includes RoHS and REACH declarations; the brand provides a CE declaration of conformity per the Low Voltage Directive. The IEC 60947-2 rating is the primary standard for European and global installations. ## Temperature derating and operating range Rated current is 25 A at 45 °C ambient. At 50 °C it derates to 24.38 A; at 55 °C to 23.72 A. The maximum ambient is 75 °C, minimum -40 °C. The influence of surrounding temperature table gives the humidity limits: max 95% up to 55 °C, max 55% up to 70 °C, max 35% up to 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz. That covers most industrial machine vibration profiles.","metaTitle":"Siemens 5SY8525-8 SENTRON MCB, 2-Pole D-Curve, 25 A, 30 kA","metaDescription":"Siemens 5SY8525-8 SENTRON miniature circuit breaker, 2-pole 1P+N, D-curve, 25 A at 45 °C, 30 kA breaking capacity IEC 60947-2. Active production. Quoted to order.","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","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","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":"230 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"25 A","at 50 °C / rated value":"24.38 A","at 55 °C / rated value":"23.72 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"30 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":"Yes","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"250 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=410523&mlfb=5SY8525-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8525-8/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 5SY8525-8 and how is it quoted for volume purchases?","answer":"We supply it through independent distribution. For volume or scheduled orders, submit an RFQ; availability and current pricing are confirmed at quote time."},{"question":"What is 5SY8525-8's listed depth and width?","answer":"Depth is 76 mm, width is 36 mm (2 modular width units). Installation depth is 70 mm."},{"question":"What compliance documentation does this brand provide for 5SY8525-8?","answer":"RoHS and REACH declarations are available. The part carries a CE declaration per the Low Voltage Directive, and UL/CSA listings per UL 1077 and CSA C22.2 No. 235."},{"question":"Will 5SY8525-8 drop into a panel specified around a different 2-pole MCB?","answer":"It mounts on standard DIN rail (EN 60715) and occupies 36 mm width. If the existing panel uses a 2-module-wide MCB with the same busbar pitch and terminal style, it will fit without rewiring. Verify the busbar system and terminal compatibility — this unit has combined terminals top and bottom."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8525-8","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/5SY8525-8 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}}