{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-4CA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-4CA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-4CA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-4CA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 4EU4321-4CA00-0A commutating choke for converters, 3-phase, 500V AC, 910A max / 819A rated, 1138A peak, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU4321-4CA00-0A is a commutating choke for converter applications — a 3-phase inductive component that limits rate-of-rise of current (di/dt) and smooths commutation notches in the DC link or AC input of a power converter. Rated for 500 V AC at 50 Hz, it handles a maximum continuous current of 910 A and a rated current of 819 A, with a peak current capability of 1 138 A. The 910 A maximum (Ithmax) and 819 A rated current (ILN) are the numbers that decide whether this choke fits your converter's line current. The 1 138 A peak rating tells you the short-duration overload it can survive — useful for sizing against inrush or fault conditions. The 4 % relative inductive voltage drop (Uk) means the choke drops about 4 % of rated voltage at rated current; if your converter's DC-link voltage budget is tight, that drop matters. Thermal class H (180 °C insulation system) and 480 W coil power loss plus 300 W iron core loss mean the choke dissipates roughly 780 W total at full load — plan ventilation or forced cooling in the enclosure, especially since the IP00 rating offers no ingress protection. Panel or cabinet mounting requires a 0.46 m by 0.435 m by 0.265 m bay. Flat-type terminals serve the main circuit. IP00 needs a clean, dry environment or an enclosure. The 40 °C ambient rating is the thermal reference.","metaTitle":"Siemens 4EU4321-4CA00-0A Commutating Choke, 910A, 500V AC","metaDescription":"Siemens 4EU4321-4CA00-0A commutating choke for converters. 3-phase, 500V AC, 910A max, 819A rated, 1138A peak. IP00, flat connectors. Mature lifecycle; 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":"910A","Rated Value":"819A","Peak current":"1 138A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"1 115.1A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000032H","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":"300W","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=435739&mlfb=4EU4321-4CA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-4CA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of this choke?","answer":"Width 0.46 m, height 0.435 m, depth 0.265 m. These are the overall envelope dimensions for panel layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-4CA00-0A","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/4EU4321-4CA00-0A 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}}