{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-4DA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-4DA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-4DA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-4DA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-4DA00-0A commutating choke for converter, 3-phase, 750 V AC, 630 A max, 567 A rated, 68 µH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU4321-4DA00-0A is a three-phase commutating choke (line reactor) designed for converter front-end circuits. It limits di/dt and reduces harmonic distortion on the AC line feeding a variable-frequency drive or DC drive. Rated for 630 A maximum continuous current at 750 V AC, 50 Hz, with a rated inductance of 68 µH and a relative inductive voltage drop of 4% at rated current. The 630 A maximum current rating and 567 A rated current tell you this choke is sized for a 400–500 kW drive on a 400 V class system — the peak current capability of 788 A handles short-duration overloads during motor acceleration. Its 68 µH inductance with a 4% voltage drop means it provides moderate line impedance to smooth current ripple without excessive volt-drop under load. Power loss splits into 480 W in the coil and 300 W in the iron core, totaling 780 W at rated load. This heat must be managed: the IP00 enclosure means no dust or moisture protection — mount it in a ventilated cabinet or dedicated enclosure. Thermal class H insulation allows a 180 °C hot-spot rating, so it survives the internal temperature rise, but the 40 °C ambient rating is the design point for the surrounding air. Dimensions are 0.46 m wide × 0.435 m high × 0.265 m deep. Flat-type terminals accept busbar or cable lug connections — plan for a bolted interface, not a spring-clamp or screw terminal. The 0.265 m depth is the critical dimension for enclosure depth selection. Marked at a mature lifecycle stage. This is not a new-release product, but it remains in the active Siemens catalog for drive system spares and new installations. It carries UL and CSA recognition per EN 61558-2-20, which covers safety of transformers, reactors, and power supply units — a key authority signal for North American panel builders requiring third-party certification.","metaTitle":"Siemens 4EU4321-4DA00-0A Commutating Choke, 630A, 750V, 3-Ph","metaDescription":"Siemens 4EU4321-4DA00-0A commutating choke for converters. Rated 630A at 750V AC, 3-phase, 68 µH. UL/CSA recognized. 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":"630A","Rated Value":"567A","Peak current":"788A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"772A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000068H","Power loss [W] of the coil":"480W","Operating voltage rated value":"750V","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=73601&mlfb=4EU4321-4DA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-4DA00-0A/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-4DA00-0A","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/4EU4321-4DA00-0A 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}}