{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY3025-6KL","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY3025-6KL","canonicalUrl":"https://aoctrl.com/siemens/5SY3025-6KL","factsUrl":"https://aoctrl.com/api/mcp/products/5SY3025-6KL","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY3025-6KL, 1-pole+N, B-curve, 25 A rated current, 230 V AC, 4.5 kA breaking capacity per EN 60898, 18 mm width, standard rail mount.","salesMarkdown":"## Siemens 5SY3025-6KL SENTRON MCB — 25 A, B-Curve, 1P+N The Siemens 5SY3025-6KL is a SENTRON miniature circuit breaker rated 25 A at 230 V AC, with a B-curve tripping characteristic and a breaking capacity of 4.5 kA per EN 60898. The 1-pole+N configuration switches both the phase and neutral, with neutral switching built in — no separate neutral block needed. The B-curve (IEC 60898) means the magnetic trip activates at 3–5× rated current, so for a 25 A breaker the instantaneous trip window is roughly 75–125 A. That is fast enough to clear a hard short without nuisance tripping on the mild inrush of a resistive heater bank or a string of LED drivers, but it will trip on the starting current of a small motor — that is the intended selectivity boundary. If your load is a pump or compressor, step up to a C-curve sibling in the same SENTRON 5SY family. If your point of common coupling is close to a large transformer (fault current above 6 kA), you need the 6 kA variant — the 5SY6020-7KL or 5SY6010-6KL, which share the same footprint but carry a higher interrupting rating. ## Panel Fit and Mechanical Notes Dimensions are 90 mm high, 76 mm deep, and 18 mm wide — a single-module footprint that fits any standard 35 mm DIN rail enclosure. The screw terminals accept solid or stranded conductors up to 16 mm², with a tightening torque range of 17.7 to 22.1 lbf·in. The breaker is sealable, which allows a panel builder to lock the toggle position after commissioning to prevent unauthorized switching.","metaTitle":"Siemens 5SY3025-6KL SENTRON MCB, 25 A, 1P+N, B-Curve, 4.5 kA","metaDescription":"Siemens 5SY3025-6KL SENTRON miniature circuit breaker, 25 A rated, B-curve, 1-pole+N, 4.5 kA breaking capacity per EN 60898. 18 mm wide, standard rail mount. Active production. Quo","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","Height":"90 mm","Maximum":"22.1 lbf·in","Minimum":"17.7 lbf·in","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"standard rail","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"230 V","Overvoltage category":"III","Combined Terminal Top":"No","Energy limiting class":"3","Number of width units":"1","Number of poles / Note":"1P+N","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"No","Current / at AC / rated value":"25 A","Tripping characteristic class":"B","acc. to EN 60898 / rated value":"4.5 kA","Position / of power supply cord":"Any","Product feature / Touch protection":"Yes","Vibration resistance / acc. to IEC 60068-2-6":"Yes","with single-phase operation / at AC / maximum":"250 V","Product function / neutral conductor switching":"Yes"}},"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=374429&mlfb=5SY3025-6KL","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY3025-6KL/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SY3025-6KL and what is the lead time?","answer":"The 5SY3025-6KL is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."},{"question":"Will 5SY3025-6KL drop into a panel specified around 5SY6020-7KL without rewiring?","answer":"Yes, the 5SY3025-6KL and 5SY6020-7KL share identical dimensions (90×76×18 mm), the same standard rail mounting, and the same terminal specs. The swap is a straight mechanical fit, but the electrical ratings differ: the 5SY3025-6KL is a 25 A B-curve breaker with 4.5 kA breaking capacity, while the 5SY6020-7KL is a 20 A C-curve breaker with 6 kA breaking capacity. Verify the load current and fault level before substituting."},{"question":"What are the key ratings of the 5SY3025-6KL?","answer":"Rated current 25 A at 230 V AC, B-curve tripping characteristic, breaking capacity 4.5 kA per EN 60898, 1-pole+N configuration with neutral switching, IP20 with connected conductors, and dimensions 90×76×18 mm for standard DIN rail mounting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY3025-6KL","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/5SY3025-6KL 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}}