{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8325-8BB08","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8325-8BB08","canonicalUrl":"https://aoctrl.com/siemens/5SY8325-8BB08","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8325-8BB08","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8325-8BB08 miniature circuit breaker, 3-pole, D tripping characteristic, 25 A rated current, 30 kA breaking capacity at 400 V AC.","salesMarkdown":"## What this MCB is and what it does The Siemens 5SY8325-8BB08 is a 3-pole miniature circuit breaker from the SENTRON series, designed for 25 A at 400 V AC with a D tripping characteristic. The D curve means it tolerates high inrush currents — typically 10 to 20 times the rated current — making it a fit for motor, transformer, and lighting ballast circuits where the start-up surge would nuisance-trip a B or C curve breaker. The IEC 60947-2 breaking capacity is 30 kA at 400 V AC, so it clears a fault up to that level without welding contacts or cascading upstream. The UL 1077 / CSA C22.2 No. 235 rating is 5 kA, which covers most North American panelboard applications. ## Panel fit and mounting Snaps onto a DIN rail via the quick assembly system — no tools needed for the rail, just a screwdriver for the terminals. Occupies 3 width units (54 mm) and requires 70 mm installation depth behind the panel. The housing is IP20 with conductors connected, which is standard for enclosed distribution boards. Terminal positions are top and bottom combined, so line and load can land on either end. Mounting position is any, and the unit is sealable for tamper-proofing after commissioning. ## Environmental and compliance notes Halogen-free and silicon-free construction, rated for ambient temperatures from -40 °C to 75 °C. Humidity tolerance: max 95% at 55 °C, derating to 35% at 75 °C. Overvoltage category III, pollution degree 3 — suitable for industrial fixed installations where the breaker sees transient overvoltages from the supply. Mechanical service life is 10 000 switching cycles typical.","metaTitle":"Siemens 5SY8325-8BB08 SENTRON MCB, 25 A, 3-Pole, D Curve, 30","metaDescription":"Siemens 5SY8325-8BB08 SENTRON miniature circuit breaker, 25 A, 3-pole, D tripping characteristic, 30 kA IEC breaking capacity, 400 V AC. Current lifecycle stage. Quoted to order ag","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","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"3","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Degree of pollution":"3","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","Design of the product":"Only magnetic tripping operation","Number of width units":"3","Number of poles / Note":"3P","acc. to DIN EN 61346-2":"F","Combined Terminal Bottom":"Yes","Suitability for operation":"Mechanical engineering / industry","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"30 kA","Product feature / Touch protection":"Yes","Operating current / at AC / rated value":"25 A","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7947bc25716669424ced62fd45384c56.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=299538&mlfb=5SY8325-8BB08","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8325-8BB08/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY8325-8BB08 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source to 5SY8325-8BB08?","answer":"The peer 5SY3132-6 is a 3-pole D-curve MCB but at a lower current rating — it will not drop into a panel specified for 25 A without rewiring the branch circuit. The 5SY8325-8BB08 is the correct 25 A variant in the same SENTRON family."},{"question":"What compliance documentation does this brand provide for 5SY8325-8BB08?","answer":"The part carries IEC 60947-2 and UL 1077 / CSA C22.2 No. 235 approvals. It is halogen-free and silicon-free, which supports RoHS and REACH compliance. The manufacturer provides a declaration of conformity and a CE marking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8325-8BB08","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/5SY8325-8BB08 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}}