{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-0CB10-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-0CB10-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-0CB10-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0CB10-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-0CB10-0A, 3-phase commutating choke for converter applications, 400V AC, 50Hz, rated 1620A (max 1800A), 0.013 mH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU4321-0CB10-0A is a three-phase commutating choke for converter applications — the component that limits the rate of rise of current during thyristor or IGBT switching, protecting the converter bridge from di/dt stress and reducing line notching. The 1620 A rated current (I LN) is the continuous thermal current the choke can carry at 40 °C ambient without exceeding its Class H (180 °C) insulation system. The 1800 A maximum (I th max) is a short-time thermal limit — use it for overload sizing, not steady-state. The 4 % relative inductive voltage drop (UK) at rated current and frequency tells you the voltage the choke consumes at full load; factor it into your drive's DC-link voltage budget. Inductance is 0.013 mH (13 µH) — a low value typical for large commutating chokes where the goal is just enough inductance to limit di/dt without dropping excessive voltage. Total power loss is 1000 W (670 W coil + 330 W iron core), all dissipated as heat. ## Physical fit and termination The choke measures 0.460 m wide × 0.435 m high × 0.265 m deep. Main circuit connections are flat-type terminals — expect busbar or heavy cable lugs, not wire ferrules. Verify the terminal hole pattern against your existing busbar layout before ordering.","metaTitle":"Siemens 4EU4321-0CB10-0A Commutating Choke, 1800A, 400V, IP0","metaDescription":"Siemens 4EU4321-0CB10-0A 3-phase commutating choke for converters. Rated 1620A (max 1800A) at 400V/50Hz. IP00, flat-type terminals. Mature lifecycle; sourced to order. Request quot","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 800A","Rated Value":"1 620A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"2 205.8A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000013H","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=213861&mlfb=4EU4321-0CB10-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0CB10-0A/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU4321-0CB10-0A and what is the lead time?","answer":"This part is sourced and quoted to order through independent distribution. Availability and current lead time are confirmed at quote time — submit an RFQ for the most current delivery window."},{"question":"What are the key electrical ratings for 4EU4321-0CB10-0A?","answer":"It is a 3-phase commutating choke rated for 1620 A continuous (1800 A maximum) at 400 V AC, 50 Hz, with 0.013 mH inductance and a 4 % relative inductive voltage drop. Total power loss is 1000 W."},{"question":"What are the physical dimensions of 4EU4321-0CB10-0A?","answer":"Width 0.460 m, height 0.435 m, depth 0.265 m. Main circuit connections are flat-type terminals."},{"question":"What protection class and thermal class does this choke have?","answer":"Protection class is IP00 (open frame, cabinet-mount required). Thermal class is H per IEC 60085 (180 °C insulation system). Rated ambient temperature is 40 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-0CB10-0A","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/4EU4321-0CB10-0A 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}}