{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7325-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7325-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7325-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7325-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7325-8, miniature circuit breaker, 3-pole, D characteristic, 25 A rated current, 15 kA (EN 60898) / 25 kA (IEC 60947-2) breaking capacity.","salesMarkdown":"The Siemens 5SY7325-8 is a SENTRON miniature circuit breaker rated 25 A at 35 °C ambient, with a D tripping characteristic that tolerates the high inrush currents typical of motor loads, transformers, and welding equipment — it will not nuisance-trip on a 5× to 10× rated startup surge. The 3-pole design (3P) switches all three phases simultaneously, which is what you need for a three-phase motor branch circuit or a 400 V distribution subfeed. At DC (per IEC 60947-2) it is rated 15 kA, so it also works in DC subdistribution where the voltage is within the device's rating. ## Temperature derating — the number that changes your BOM The 25 A rating holds at 35 °C. Above that, the breaker must be derated: 23.8 A at 40 °C, 23.18 A at 45 °C, 22.55 A at 50 °C, 21.88 A at 55 °C, and 21.2 A at 60 °C. If your panel ambient runs 50 °C, you cannot load this breaker past 22.55 A continuous — a common miss during BOM freeze that leads to thermal tripping on a warm day. The surrounding temperature influence is also specified: max 95% RH up to 55 °C, tapering to 35% at 75 °C. ## Panel integration — DIN rail, IP20, quick assembly The housing is 3 modular width units (54 mm wide, 90 mm tall, 76 mm deep) with an installation depth of 70 mm. The product designation per IEC 81346-2 and DIN EN 61346-2 is F (protective device).","metaTitle":"Siemens 5SY7325-8 SENTRON MCB, 25 A, 3-Pole, D Curve","metaDescription":"Siemens 5SY7325-8 SENTRON miniature circuit breaker, 25 A, 3-pole, D tripping characteristic, 15 kA (EN 60898) / 25 kA (IEC 60947-2). Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY7325-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 15kA, 3-pole, D, 25A, D=70 mm","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","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":"25 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"25 A","at 40 °C / rated value":"23.8 A","at 45 °C / rated value":"23.18 A","at 50 °C / rated value":"22.55 A","at 55 °C / rated value":"21.88 A","at 60 °C / rated value":"21.2 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"3","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":"25 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","Type Of Voltage / Of The Operating Voltage":"AC","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 Component / 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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$48.26","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7770ac74a769f4896c5a1229371339ff.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=31705&mlfb=5SY7325-8"},"ai":{"faq":[{"question":"How do I get pricing and availability for 5SY7325-8?","answer":"Pricing and availability are confirmed at quote time. Submit an RFQ against this order code; the part is sourced through independent distribution and quoted to order."},{"question":"What is the closest functional second-source to 5SY7325-8?","answer":"The 5SY4140-7 is a similar SENTRON MCB but with a different current rating and tripping characteristic — verify your load requirements before substituting. The 5SY7325-8 is a 25 A, D-curve, 3-pole device; the 5SY4140-7 may have a different breaking capacity or pole count."},{"question":"Will 5SY7325-8 drop into a panel specified around 5SY4140-7?","answer":"Both are SENTRON MCBs on the same DIN-rail footprint, so the mechanical fit is identical. However, the electrical ratings differ — confirm that the 25 A D-curve matches your load before swapping."},{"question":"What compliance documentation does Siemens provide for 5SY7325-8?","answer":"The breaker is halogen-free and silicon-free. It carries ratings per EN 60898 and IEC 60947-2. Standard Siemens documentation includes the declaration of conformity and material declarations; request these with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7325-8","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/5SY7325-8 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}