{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3921-6BA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3921-6BA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3921-6BA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3921-6BA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU3921-6BA00-0A, commutating choke for converter, 3-phase, 710A AC / 870A DC, 500V, 50Hz, IP00, flat-type terminals, UL/CSA recognized.","salesMarkdown":"## What this choke does in the drive cell The Siemens 4EU3921-6BA00-0A is a 3-phase commutating choke (line reactor) for converter front-ends, rated 710 A AC continuous (639 A operational) at 500 V, 50 Hz, with a DC rated current of 870 A and a peak current capability of 888 A. The IP00 open-frame construction means it mounts inside a panel or enclosure that provides its own protection — no exposed installation in a washdown or dusty area. ## Thermal class H and power loss budget Thermal class H (180 °C winding hot-spot) per IEC 60085 lets this choke run hot — useful when it shares a cabinet with drives that raise ambient well above 40 °C. Total power loss splits 378 W in the coil and 210 W in the iron core at rated load, so the panel ventilation needs to clear roughly 590 W of heat from this one component. The 40 °C ambient rating is the reference point; above that, derate the continuous current. ## Termination and physical fit Main circuit connection uses flat-type terminals — expect bus-bar or large-lug cabling, not ring-tongue on a terminal block. Dimensions are 0.41 m wide × 0.385 m high × 0.229 m deep, so it needs a clear footprint on the panel floor or a dedicated mounting plate. IP00 means no touch protection; the enclosure must provide the guarding. The choke is UL/CSA recognized and designed to EN 61558-2-20, covering safety of transformers, reactors, and power supply units. That recognition matters for panel builders who need a UL 508A listed component in the BOM.","metaTitle":"4EU3921-6BA00-0A Commutating Choke, 710A AC, 500V, 50Hz","metaDescription":"Siemens 4EU3921-6BA00-0A commutating choke for converters. Rated 710A AC / 870A DC at 500V, 50Hz. IP00, flat-type terminals, UL/CSA recognized. Sourced to order.","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","Peak Current":"888A","Phase Number":"3","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Designation":"Kommut.-Drossel f. Stromrichter","protection class IP":"IP00","current at AC maximum":"710A","Inductivity Rated Value":"3.9E-5H","current at DC rated value":"870A","power loss [W] of the coil":"378W","Operating Voltage Rated Value":"500V","Ambient Temperature Rated Value":"40°C","Operating Frequency Rated Value":"50Hz","power loss [W] of the iron core":"210W","thermal class according 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=204465&mlfb=4EU3921-6BA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3921-6BA00-0A/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 4EU3921-6BA00-0A?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What are the key electrical ratings of the 4EU3921-6BA00-0A?","answer":"Rated 710 A AC continuous (639 A operational) at 500 V, 50 Hz, with a DC rated current of 870 A and a peak current of 888 A. Inductance is 0.0392 mH with a 4 % relative inductive voltage drop."},{"question":"What compliance documentation does this choke carry?","answer":"It is UL/CSA recognized and designed to EN 61558-2-20."},{"question":"What are the physical dimensions of the 4EU3921-6BA00-0A?","answer":"Width 0.41 m, height 0.385 m, depth 0.229 m. IP00 open-frame construction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3921-6BA00-0A","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/4EU3921-6BA00-0A 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}}