{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-0DC00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-0DC00","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-0DC00","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0DC00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-0DC00 commutating choke for converter, 3-phase, 400 V AC, 650 A rated, 97 µH, IP00, thermal class H, flat-type terminals.","salesMarkdown":"## Commutating Choke for Converter Duty The Siemens 4EU4321-0DC00 is a three-phase commutating choke designed for converter applications, rated at 650 A continuous and 400 V AC. With an inductance of 97 µH and a relative inductive voltage drop of 0%, it limits current rise during commutation events in the converter's DC link or AC input, protecting the semiconductor switches from di/dt stress. The choke is wound for thermal class H (180 °C) per IEC 60085, with a combined power loss of 670 W in the coil and 365 W in the iron core at rated conditions. ## Sizing and Thermal Considerations The DC equivalent rating is 796.5 A, which matters when the choke is used in a six-pulse converter where the DC link current is roughly 1.225 times the AC line current. The 670 W coil loss plus 365 W iron loss means the choke dissipates over 1 kW at full load — plan for forced ventilation or generous cabinet volume to keep the ambient below 40 °C. The flat-type terminals accept busbar or cable lugs for the main current circuit. Panel builders should verify the terminal dimensions against their lug width — the 0.46 m width and 0.435 m height give enough clearance for 650 A cable routing, but the 0.265 m depth is shallow enough for most 800 mm deep enclosures.","metaTitle":"Siemens 4EU4321-0DC00 Commutating Choke, 650 A, 400 V AC, 97","metaDescription":"Siemens 4EU4321-0DC00 commutating choke for converter. 650 A rated, 400 V AC, 97 µH, IP00, thermal class H. 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":"650A","Rated Value":"650A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"796.5A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000097H","Power loss [W] of the coil":"670W","Operating voltage rated value":"0, 400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"0 ... 50Hz","Power loss [W] of the iron core":"365W","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":"0%"}},"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=207463&mlfb=4EU4321-0DC00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0DC00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU4321-0DC00 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit an RFQ with your target quantity and delivery date; availability and pricing are confirmed at quote time."},{"question":"What are the key electrical ratings of 4EU4321-0DC00?","answer":"Rated 650 A continuous at 400 V AC, 50 Hz, three-phase, with 97 µH inductance and a relative inductive voltage drop of 0%. The DC equivalent rating is 796.5 A."},{"question":"What is the physical size of 4EU4321-0DC00?","answer":"Width 0.46 m, height 0.435 m, depth 0.265 m. The IP00 enclosure requires installation inside a cabinet."},{"question":"What thermal class and power loss does this choke have?","answer":"Thermal class H (180 °C) per IEC 60085. Coil power loss is 670 W, iron core loss is 365 W at rated conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-0DC00","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/4EU4321-0DC00 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}}