{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-1AC00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-1AC00","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-1AC00","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-1AC00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4521-1AC00, 3-phase commutating choke for converters, 460V AC, 1000A rated, 0.033mH, IP00, flat-type terminals, thermal class H.","salesMarkdown":"The Siemens 4EU4521-1AC00 is a three-phase commutating choke (line reactor) designed for converter applications. It smooths current ripple and limits di/dt on the DC link or input side of a variable-speed drive, reducing harmonics and protecting the converter semiconductors. Rated for 1000 A continuous at 460 V AC, 0–50 Hz, with an inductivity of 0.033 mH and a 4% relative inductive voltage drop at rated current. That 4% drop is typical for a commutating choke — it provides enough impedance to limit fault current without excessive voltage sag under load. ## Thermal and enclosure reality IP00 means no enclosure — this is an open-frame component for installation inside a cabinet. Combined coil losses of 501 W and iron-core losses of 280 W total nearly 800 W of heat that must be ventilated out of the panel. Thermal class H (180 °C insulation) allows high hotspot temperatures, but the panel designer must still account for the heat rise. Dimensions are 0.460 m wide × 0.435 m high × 0.293 m deep — a substantial footprint. Flat-type terminals on the main circuit mean bolted bus-bar or cable-lug connections, not quick-connects. Verify the gland-plate clearance before panel layout.","metaTitle":"Siemens 4EU4521-1AC00 Commutating Choke, 1000A, 0.033mH","metaDescription":"Siemens 4EU4521-1AC00 3-phase commutating choke for converters. Rated 1000A AC, 0.033mH, 460V, IP00. Mature lifecycle; sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.293m","Width":"0.46m","Height":"0.435m","Maximum":"1 000A","Rated Value":"1 000A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"1 225.4A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000033H","Power loss [W] of the coil":"501W","Operating voltage rated value":"0, 460V","Ambient temperature rated value":"40°C","Operating frequency rated value":"0 ... 50Hz","Power loss [W] of the iron core":"280W","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":"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=64819&mlfb=4EU4521-1AC00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-1AC00/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-1AC00","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/4EU4521-1AC00 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}}