{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU2451-2UA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU2451-2UA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU2451-2UA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU2451-2UA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU2451-2UA00-0A mains choke (Netzdrossel f. FU), 3-phase, 400/480 VAC, 160 A max / 144 A rated, 0.088 mH, 2% voltage drop, IP00, Class H, flat-type terminals.","salesMarkdown":"The Siemens 4EU2451-2UA00-0A is a three-phase mains choke (line reactor) designed for installation ahead of a variable-frequency drive (VFD). It smooths the input current, limits harmonic distortion, and protects the drive's DC bus from line transients. Rated for 400/480 VAC at 50/60 Hz, it carries a maximum continuous current of 160 A and a rated current of 144 A — the figure you use for sizing against your motor load. That 2% figure is the design target: it's enough to suppress harmonics without dropping excessive voltage across the choke under load. This is an IP00 open-frame choke — no enclosure, no finger-safe covers. Dimensions are 0.225 m wide, 0.21 m high, and 0.147 m deep; plan your gland plate and DIN-rail layout accordingly, though the choke itself bolts to a mounting plate rather than snapping onto a rail. The main circuit connects via flat-type terminals — expect bus-bar or cable-lug terminations, not spring-cage or screw-clamp. Verify your lug width and bolt size against the terminal opening before panel assembly. ## Thermal and insulation class Rated for a 40 °C ambient, the coil dissipates 120 W at full load. Class H insulation (180 °C rated) gives a generous thermal margin — the choke can run hot without degrading the winding insulation, which matters in a crowded panel where airflow is restricted.","metaTitle":"Siemens 4EU2451-2UA00-0A Mains Choke, 160 A, 3-Phase, 400/48","metaDescription":"Siemens 4EU2451-2UA00-0A mains choke for VFDs. 160 A max, 144 A rated, 3-phase, 400/480 VAC, 50/60 Hz. IP00, Class H insulation. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.147m","Width":"0.225m","Height":"0.21m","Maximum":"160A","Rated Value":"144A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel f. FU","Protection class IP":"IP00","Inductivity rated value":"0.000088H","Power loss [W] of the coil":"120W","Operating voltage rated value":"400, 480V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50 ... 60Hz","Thermal class acc. to IEC 60085":"H","Type of electrical connection for main current circuit":"flat connector","Relative inductive drop in voltage on the measurement level current, voltage and frequency":"2%"}},"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=25559&mlfb=4EU2451-2UA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU2451-2UA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What is the 4EU2451-2UA00-0A used for?","answer":"It is a three-phase mains choke (line reactor) installed ahead of a variable-frequency drive to limit harmonic distortion, smooth input current, and protect the drive's DC bus from line transients."},{"question":"What are the key ratings of the 4EU2451-2UA00-0A?","answer":"Maximum continuous current is 160 A, rated current is 144 A, operating voltage is 400/480 VAC at 50/60 Hz, inductance is 0.000088 H, and the relative inductive voltage drop is 2%."},{"question":"Where can I buy the 4EU2451-2UA00-0A?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU2451-2UA00-0A","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/4EU2451-2UA00-0A 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}}