{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3951-6UA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3951-6UA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3951-6UA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3951-6UA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 4EU3951-6UA00-0A mains choke for frequency converters, 3-phase, AC, 710 A max, 400/480 V, 39 µH, 4% voltage drop, IP00, flat-type terminals.","salesMarkdown":"## Line reactor for drive input harmonics The Siemens 4EU3951-6UA00-0A is a three-phase mains choke (line reactor) rated for 710 A AC maximum current at 400/480 V AC, 50/60 Hz. It sits between the supply and a frequency converter to limit harmonic distortion, reduce voltage notching, and protect the drive DC bus from line transients. Total power loss runs 730 W (540 W coil + 190 W iron core) at 40 °C ambient, thermal class H insulation per IEC 60085. That means the winding can sustain 180 °C hot-spot temperature — adequate for continuous duty inside a ventilated cabinet. The IP00 open-frame construction requires the panel builder to provide finger-safe clearance or a separate enclosure; this is not a stand-alone device. Main circuit connection uses flat-type terminals. The 0.229 m depth, 0.41 m width, and 0.385 m height require a dedicated mounting plate. The 639 A operational current (I LN) is the rated continuous current at the nominal 4% voltage drop; if your drive draws 639 A or less, the reactor stays within its design impedance. Above that, the voltage drop climbs and the core may saturate earlier. The 4% relative inductive voltage drop (Uk) at rated current is a standard value for drive input reactors. It provides enough impedance to attenuate the 5th and 7th harmonics that dominate a 6-pulse rectifier input, without dropping so much voltage that the DC bus undervolts during heavy load. If your application requires tighter harmonic control (IEEE 519 compliance), you may need a higher-impedance reactor or a multi-pulse drive — but for most industrial VFD installations, 4% is the sweet spot.","metaTitle":"Siemens 4EU3951-6UA00-0A Mains Choke, 710 A, 400/480 V AC","metaDescription":"Siemens 4EU3951-6UA00-0A mains choke for frequency converters. 3-phase, 710 A AC max, 400/480 V AC, 39 µH, 4% voltage drop, IP00. Mature lifecycle, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.229m","Width":"0.41m","Height":"0.385m","Phase Number":"3","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Designation":"Netzdrossel f. FU","protection class IP":"IP00","current at AC maximum":"710A","Inductivity Rated Value":"0.000039H","power loss [W] of the coil":"540W","Operating Voltage Rated Value":"400, 480V","Ambient Temperature Rated Value":"40°C","Operating Frequency Rated Value":"50 ... 60Hz","power loss [W] of the iron core":"190W","thermal class acc. to IEC 60085":"H","operational current at AC rated value":"639A","Type Of Electrical Connection For Main Current Circuit":"flat connector","Relative Inductive Drop In Voltage For Rated Value Of The Current, Voltage And Frequency":"4%"}},"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=24196&mlfb=4EU3951-6UA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3951-6UA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What is the 4EU3951-6UA00-0A's listed depth and width?","answer":"The depth is 0.229 m and the width is 0.41 m, with a height of 0.385 m. These dimensions are for the reactor body only; allow additional clearance for flat-type terminal connections and airflow."},{"question":"What compliance documentation does Siemens provide for this choke?","answer":"The part is UL/CSA recognized per EN 61558-2-20, as noted on the product label. Siemens typically supplies a Declaration of Conformity for CE marking on request. RoHS and REACH compliance are standard for current-production Siemens industrial components, but specific certificates should be requested at time of order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3951-6UA00-0A","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/4EU3951-6UA00-0A 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}}