{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3921-8BA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3921-8BA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3921-8BA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3921-8BA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 4EU3921-8BA00-0A commutating choke for converters, 3-phase, 690V AC, 504A rated current, 560A max, 68 µH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU3921-8BA00-0A is a 3-phase commutating choke for converter applications, rated at 504 A continuous with a maximum current of 560 A and a peak rating of 700 A. The 504 A rated current (I LN) is the continuous thermal current the choke can carry at 40 °C ambient — this is the number to match against your drive's continuous input current, not the peak. The 560 A maximum (Ithmax) is the thermal limit under overload conditions; the 700 A peak handles short-duration transients during converter commutation. The 68 µH inductance and 4% voltage drop are sized for a specific converter power range — too low an inductance and the choke won't limit di/dt enough; too high and you lose too much voltage across it. This is a matched component, not a generic line reactor. IP00 means open-frame construction — no enclosure. It's intended for mounting inside a cabinet where the panel itself provides the environmental seal. The flat-type terminals accept busbar or cable lug connections typical of high-current power paths. Commutating chokes sit between the AC line and a converter's input rectifier, or between a drive's DC link and the inverter stage. Their job is to limit the rate of current rise (di/dt) during switching events, reducing stress on the semiconductor devices and filtering commutation notches that would otherwise reflect back onto the line.","metaTitle":"Siemens 4EU3921-8BA00-0A Commutating Choke, 504A, 690V, 68µH","metaDescription":"Siemens 4EU3921-8BA00-0A commutating choke for converters. 3-phase, 504A rated, 690V, 68µH, 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":"0.229m","Width":"0.41m","Height":"0.385m","Maximum":"560A","Rated Value":"504A","Peak current":"700A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"686.2A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000068H","Power loss [W] of the coil":"375W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"220W","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=230567&mlfb=4EU3921-8BA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3921-8BA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key electrical ratings for 4EU3921-8BA00-0A?","answer":"Rated current 504 A, maximum current 560 A, peak current 700 A, rated voltage 690 V AC at 50 Hz, inductance 68 µH, relative inductive voltage drop 4%."},{"question":"Where can I buy the 4EU3921-8BA00-0A?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Current pricing and availability are confirmed at quote time."},{"question":"What is the physical size of this choke?","answer":"The 4EU3921-8BA00-0A measures 0.385 m height, 0.41 m width, and 0.229 m depth."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3921-8BA00-0A","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/4EU3921-8BA00-0A 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}}