{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-0AX00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-0AX00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-0AX00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0AX00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-0AX00-0A, commutating choke for converter, 3-phase, 575 V AC, 50 Hz, 1040 A max, 936 A rated, IP00, thermal class H, flat-type terminals.","salesMarkdown":"The 4EU4321-0AX00-0A is a three-phase commutating choke for converter applications, rated 575 V AC at 50 Hz. It carries a maximum continuous current of 1 040 A and a rated current of 936 A, with a peak current capability of 1 300 A. The 0.00003 H inductance and 4% relative inductive voltage drop are sized for line-side or DC-link commutation in high-power drives and rectifier stacks. The 1 040 A maximum is the thermal limit at 50 Hz — the choke can carry that continuously at 40 °C ambient without exceeding class H insulation temperature rise. The 936 A rated value is the design-point current for the 4% voltage drop figure; if your converter draws more than that at full load, the choke's impedance will drop more voltage than the 4% spec, which shifts the DC-link voltage available to the inverter. The 1 300 A peak rating covers short-duration transients like inrush or fault clearing — it's not a repetitive rating. At DC, the rated current is 1 274.5 A — higher than the AC rating because skin effect and core losses are lower. If you're using this in a DC-link bus rather than an AC line reactor, the DC figure governs. Total power loss splits between the coil (681 W) and the iron core (325 W), summing to about 1 kW of heat that needs to leave the enclosure. IP00 means no ingress protection — this choke is designed for cabinet mounting where the enclosure provides the environmental seal. The 0.265 m depth, 0.46 m width, and 0.435 m height define the mounting footprint; flat-type terminals on the main circuit accept busbar or large cable lugs. ## Deployment context This choke sits between the line supply and a converter's rectifier stage, or in the DC link, to limit commutation notches and reduce harmonic distortion. It's a panel-mount component — the IP00 rating means the cabinet provides the environmental protection. The flat-type terminals are sized for high-current busbar connections typical in drive cabinets or power distribution centers. Thermal class H insulation (180 °C rated) gives headroom for the 1 kW of total losses in a confined cabinet, but forced ventilation or a heatsink is advisable at full load.","metaTitle":"4EU4321-0AX00-0A Commutating Choke, 1040 A, 575 V, IP00","metaDescription":"4EU4321-0AX00-0A commutating choke for converter, 3-phase, 1040 A max, 936 A rated, 575 V AC, 50 Hz, IP00, thermal class H. Sourced to order. Request quote.","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 040A","Rated Value":"936A","Peak current":"1 300A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"1 274.5A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00003H","Power loss [W] of the coil":"681W","Operating voltage rated value":"575V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"325W","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=455810&mlfb=4EU4321-0AX00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0AX00-0A/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU4321-0AX00-0A and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What is the depth of 4EU4321-0AX00-0A?","answer":"The depth is 0.265 m. Combined with the 0.46 m width and 0.435 m height, this defines the panel-mount footprint for cabinet layout."},{"question":"What compliance documentation does this brand provide?","answer":"The part carries UL/CSA recognition per the description. It is designed to EN 61558-2-20. RoHS and REACH compliance documentation is typically available from the manufacturer upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-0AX00-0A","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/4EU4321-0AX00-0A 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}}