{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-2DA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-2DA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-2DA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-2DA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-2DA00-0A, 3-phase commutating choke for converters, 690V AC, 910A max, 819A rated, 50Hz, IP00, flat-type terminals, thermal class H.","salesMarkdown":"The 0.000043 H inductance and 4% relative inductive voltage drop are sized to limit di/dt and smooth commutation notches on the converter's input — critical for protecting the DC link capacitors and reducing harmonic distortion on the line side. At 910 A max and 819 A rated, this choke is sized for a 690 V AC drive system pulling around 900 A — think a large conveyor drive, a mine hoist, or a multi-motor pump station. The 1,138 A peak handles inrush during converter start-up without saturating the core. IP00 means it's an open-frame component: mount it inside a ventilated cabinet, not in a washdown area. The flat-type terminals accept busbar or large cable lugs — plan for a bolted connection, not a spring cage. Dimensions are 0.46 m wide, 0.435 m high, 0.265 m deep; that's a substantial footprint, so verify your gland plate and DIN rail clearance before committing the panel layout. ## Thermal and loss budget Total power loss is 728 W — 448 W in the coil and 280 W in the iron core. At 40 °C ambient, that's a lot of heat to evacuate. Thermal class H per IEC 60085 means the insulation system can handle 180 °C hot-spot temperature, so the choke won't cook itself, but your cabinet ventilation needs to move that 728 W out. Derate the ambient if your enclosure runs hotter than 40 °C — the class H rating gives headroom, but the copper losses scale with current squared.","metaTitle":"Siemens 4EU4321-2DA00-0A Commutating Choke, 910A, 690V AC","metaDescription":"Siemens 4EU4321-2DA00-0A 3-phase commutating choke for converters. Rated 819A, max 910A, 690V AC, 50Hz, IP00, flat connectors. Mature lifecycle; 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":"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":"0.000043H","Power loss [W] of the coil":"448W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"280W","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=87322&mlfb=4EU4321-2DA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-2DA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 4EU4321-2DA00-0A?","answer":"It is a 3-phase commutating choke rated 690 V AC, 50 Hz, with a maximum continuous current of 910 A, a rated current of 819 A, and a peak current of 1,138 A. Inductance is 0.000043 H with a 4% voltage drop. Total power loss is 728 W at 40 °C ambient."},{"question":"Where can I buy 4EU4321-2DA00-0A and how is it quoted?","answer":"This part is sourced through independent distribution channels. It is quoted to order against an RFQ; availability and current pricing are confirmed at the time of quote. No stock count or price is listed here — submit an RFQ for a firm commercial offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-2DA00-0A","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/4EU4321-2DA00-0A 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}}