{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3951-6UB00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3951-6UB00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3951-6UB00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3951-6UB00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU3951-6UB00-0A mains choke for variable-frequency drives, 3-phase, 690 V AC, 50 Hz, rated current 1008 A, max 1120 A, 0.022 mH, IP00, thermal class H, flat-type terminals.","salesMarkdown":"## What it is and what it does The Siemens 4EU3951-6UB00-0A is a three-phase mains choke (line reactor) designed for the input side of a variable-frequency drive. It smooths current harmonics, limits inrush, and provides a degree of protection against line-side transients — the 2 % relative inductive voltage drop at rated current and frequency is the key figure that governs its filtering effect. Rated for 1008 A continuous (1120 A maximum) at 690 V AC, 50 Hz, with an inductance of 0.022 mH. The 540 W coil loss and 190 W iron-core loss at rated conditions give a total self-heating of 730 W — that heat must be managed in the enclosure, especially given the IP00 open-frame construction. Thermal class H (180 °C) insulation per IEC 60085 means the winding can handle sustained hot-spot temperatures up to that class limit, which is typical for drive-duty chokes that see high ambient plus self-heating. ## Mounting and integration The choke measures 0.41 m wide by 0.385 m tall by 0.229 m deep — a substantial footprint. IP00 means it has no enclosure; it must be mounted inside a panel or cabinet that provides the required touch protection and cooling airflow. The flat-type terminals on the main circuit accept busbar or large cable lugs; plan for adequate bending radius and clearance around the connections.","metaTitle":"Siemens 4EU3951-6UB00-0A Mains Choke, 1120 A, 690 V AC, 50 H","metaDescription":"Siemens 4EU3951-6UB00-0A mains choke for variable-frequency drives. Rated 1008 A, 690 V AC, 50 Hz, 0.022 mH, IP00, thermal class H, UL/CSA recognized. Sourced to order; request quo","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","Maximum":"1 120A","Rated Value":"1 008A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel f. FU","Protection class IP":"IP00","Inductivity rated value":"0.000022H","Power loss [W] of the coil":"540W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"190W","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=111554&mlfb=4EU3951-6UB00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3951-6UB00-0A/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this brand provide for 4EU3951-6UB00-0A?","answer":"The choke carries UL and CSA recognition per EN 61558-2-20. The manufacturer typically provides a declaration of conformity for CE marking; RoHS and REACH compliance documentation should be available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3951-6UB00-0A","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/4EU3951-6UB00-0A 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}}