{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-0DA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-0DA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-0DA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0DA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-0DA00-0A commutating choke for converter applications, 3-phase, 690V AC, 710A max / 639A rated, 53 µH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU4321-0DA00-0A is a three-phase commutating choke (line reactor) designed for converter front-ends. It smooths the current ripple and limits di/dt on the line side of a variable-frequency drive or rectifier, protecting both the converter semiconductors and the upstream network from harmonic stress and switching transients. The peak current capability reaches 888 A, and at DC the rated value is 870 A — relevant if the choke is used in a DC-link application rather than the AC line input. Inductance is 53 µH (0.000053 H), with a relative inductive voltage drop of 4% at the rated current and frequency. That 4% figure is the design target for typical converter line reactors — high enough to limit harmonics effectively, low enough to avoid excessive voltage drop under load. ## Thermal design and installation constraints Total power loss splits between the coil (470 W) and the iron core (330 W), summing to 800 W of heat that must be dissipated. The thermal class is H (180 °C temperature index per IEC 60085), meaning the insulation system can handle sustained elevated temperatures — essential for a choke running near its full rating in a closed panel. Rated ambient temperature is 40 °C. IP00 protection class means the choke has no enclosure. Dimensions are 0.435 m high, 0.46 m wide, and 0.265 m deep. The main current circuit connects via flat-type terminals — busbar or flat-cable lugs, not screw-clamp wire terminals. Verify the busbar interface matches your panel layout before committing the footprint.","metaTitle":"4EU4321-0DA00-0A Commutating Choke, 710A, 690V AC, 3-Phase","metaDescription":"Siemens 4EU4321-0DA00-0A commutating choke for converters. 710A max, 639A rated, 690V AC, 3-phase, 53 µH, IP00. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.265m","Width":"0.46m","Height":"0.435m","Maximum":"710A","Rated Value":"639A","Peak current":"888A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"870A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000053H","Power loss [W] of the coil":"470W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"330W","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=126192&mlfb=4EU4321-0DA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0DA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available for 4EU4321-0DA00-0A?","answer":"The evidence does not list specific compliance certifications (RoHS, REACH, UL, IEC) for this order code. The design reference to EN 61558-2-20 in the description indicates it falls under the safety standard for chokes. Request the manufacturer's declaration at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-0DA00-0A","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/4EU4321-0DA00-0A 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}}