{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-0CC10-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-0CC10-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-0CC10-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0CC10-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-0CC10-0A commutating choke for converter, 3-phase, 400V AC, 50Hz, rated 1800A (max 2000A), 0.0117mH, IP00, thermal class H, flat-type terminals.","salesMarkdown":"The Siemens 4EU4321-0CC10-0A is a 3-phase commutating choke for converter applications, rated for a continuous current of 1800 A with a maximum of 2000 A at 400 V AC, 50 Hz. Per the datasheet, the total power loss splits into 670 W in the coil and 330 W in the iron core, which together define the thermal load the enclosure must vent. The 1800 A rated value is the continuous thermal current the choke can carry at 40 °C ambient without exceeding thermal class H (180 °C) insulation limits. The 2000 A maximum is the short-time thermal withstand — the current the choke can handle for a defined overload period without damage. For a converter line, the 1800 A figure governs the continuous RMS load; the 2000 A ceiling provides headroom for transient overloads typical during motor acceleration or fault clearing. The DC rated value of 2450.9 A applies when the choke is used in a DC link rather than the AC line side — a useful cross-check if the application is a DC drive retrofit. ## Thermal class and enclosure requirements Rated thermal class H per IEC 60085 means the insulation system is qualified for a continuous hot-spot temperature of 180 °C. The combined 1000 W total loss (670 W coil + 330 W iron core) must be dissipated; at IP00 the choke relies on forced air or cabinet ventilation — it is an open-frame component, not sealed. Mounting within a panel requires clearance for airflow and a thermal calculation to keep the ambient at the terminals below 40 °C. The flat-type main circuit connectors accept busbar or cable lugs; verify the hole pattern matches your existing buswork before committing the BOM line.","metaTitle":"4EU4321-0CC10-0A Commutating Choke, 2000A, 400V AC, 50Hz","metaDescription":"Siemens 4EU4321-0CC10-0A commutating choke for 3-phase converters. Rated 1800A (max 2000A) at 400V AC, 50Hz. IP00 open-frame, thermal class H. 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":"2 000A","Rated Value":"1 800A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"2 450.9A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000011H","Power loss [W] of the coil":"670W","Operating voltage rated value":"400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"330W","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=249008&mlfb=4EU4321-0CC10-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0CC10-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key electrical ratings for 4EU4321-0CC10-0A?","answer":"The choke is rated for 1800 A continuous (2000 A maximum) at 400 V AC, 50 Hz, 3-phase, with 0.0117 mH inductance and 4% relative inductive voltage drop. DC rating is 2450.9 A. Total power loss is 1000 W (670 W coil + 330 W iron core)."},{"question":"What are the physical dimensions of 4EU4321-0CC10-0A?","answer":"Width 0.46 m, height 0.435 m, depth 0.265 m. Protection class IP00 (open frame). Main circuit connection is via flat-type terminals."},{"question":"Where can I buy 4EU4321-0CC10-0A and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time."},{"question":"What compliance documentation is available for 4EU4321-0CC10-0A?","answer":"The choke is designed to EN 61558-2-20. Thermal class H per IEC 60085. The evidence does not list RoHS, REACH, or UL file numbers; request the manufacturer's declaration of conformity with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-0CC10-0A","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/4EU4321-0CC10-0A 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}}