{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-5CA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-5CA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-5CA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-5CA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-5CA00-0A commutating choke for converter, 3-phase, 500 V AC, 900 A rated current, 29 µH, IP00, flat-type terminals, UL/CSA recognized.","salesMarkdown":"The Siemens 4EU4321-5CA00-0A is a 3-phase commutating choke for converter applications, rated 900 A continuous with a peak current capability of 1 250 A. The choke is designed for use in power conversion circuits where it limits di/dt and reduces harmonic stress on semiconductors. The 900 A rated current is the continuous thermal current at 40 °C ambient — this is the line current the choke can carry without exceeding its thermal class H insulation. The 1 250 A peak rating covers transient overloads typical during converter startup or fault clearing. Inductance of 29 µH with a 4% voltage drop at rated current means the choke introduces a predictable impedance into the converter commutation path, limiting current rise rates and protecting the switching devices. The 480 W coil loss plus 274 W iron core loss total 754 W — factor this heat into your enclosure ventilation. IP00 protection class means the choke is open-frame — no ingress protection. Flat-type terminals accept busbar or cable lugs; plan for bolted connections, not spring clamps. This choke sits between the converter (VFD or DC drive) and the supply line, or in the DC link, to suppress commutation notches and limit fault current. Common in industrial drive systems for pumps, conveyors, and compressors where a 3-phase 500 V AC supply feeds a converter rated near 900 A.","metaTitle":"Siemens 4EU4321-5CA00-0A Commutating Choke, 900 A, 500 V AC","metaDescription":"Siemens 4EU4321-5CA00-0A commutating choke for converter, 3-phase, 500 V AC, 900 A rated, 29 µH, IP00, UL/CSA recognized. Available to order.","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":"1 000A","Rated Value":"900A","Peak current":"1 250A","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":"0.000029H","Power loss [W] of the coil":"480W","Operating voltage rated value":"500V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"274W","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=452982&mlfb=4EU4321-5CA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-5CA00-0A/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU4321-5CA00-0A and get a price?","answer":"We source this part to order against an RFQ. Submit a request and we will confirm availability and current pricing — no stock or price figures are published here."},{"question":"What are the key specifications of 4EU4321-5CA00-0A?","answer":"Rated current 900 A, peak current 1 250 A, inductance 29 µH, rated voltage 500 V AC, 3-phase, 50 Hz, IP00, thermal class H, flat-type terminals, UL/CSA recognized."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-5CA00-0A","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/4EU4321-5CA00-0A 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}}