{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3921-2AA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3921-2AA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3921-2AA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3921-2AA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU3921-2AA00-0A commutating choke for converter, 3-phase, 500V AC, 630A max / 567A rated, 50Hz, IP00, thermal class H, flat-type terminals.","salesMarkdown":"The Siemens 4EU3921-2AA00-0A is a 3-phase commutating choke for converter applications, rated 500V AC with a maximum current of 630A and a continuous rated current of 567A at 50Hz. The 0.000055H inductance and 4% relative inductive voltage drop are sized to limit di/dt and reduce commutation notches on the line side of a 6-pulse or 12-pulse converter bridge — a common fit for medium-voltage drive input sections or DC-link smoothing in heavy industrial converters. The 567A rated current (630A maximum) at 500V AC, 50Hz tells you this choke is sized for a converter input drawing around 315 kW at 500V (assuming typical power factor and efficiency). The 772A DC rated value confirms it can also sit in the DC link of a 6-pulse drive where the DC current is higher than the AC line current. The 4% voltage drop is the impedance at rated current — that's the commutation notch suppression you get; if your system needs tighter harmonic mitigation, you'd look for a higher impedance (typically 6-8% for 12-pulse). Thermal class H means the winding insulation can handle a 180°C hot-spot temperature. That's a step above the common class F (155°C) and tells you this choke is designed for continuous full-load operation in a 40°C ambient without derating — useful in a crowded converter cabinet where airflow is marginal. The total power loss of 600W (380W coil + 220W iron core,) is the heat you need to vent; at IP00, there's no enclosure, so it relies on the cabinet's forced-air or natural convection. This class of part — a commutating choke — sits between the AC line and the input of a thyristor or diode rectifier in a variable-speed drive, DC drive, or UPS. Its job is to limit the rate of current rise (di/dt) during commutation, which reduces voltage notches on the supply and lowers harmonic distortion. In a typical 500V drive cabinet, you'd bolt this choke to the chassis or mount it on a separate sub-panel; the flat-type terminals accept busbar or large cable lugs, not DIN-rail spring clamps.","metaTitle":"4EU3921-2AA00-0A Commutating Choke, 630A, 500V, 3-Phase","metaDescription":"Siemens 4EU3921-2AA00-0A commutating choke for converters. 630A max, 567A rated, 500V AC, 3-phase, IP00, thermal class H. Sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.229m","Width":"0.41m","Height":"0.385m","Maximum":"630A","Rated Value":"567A","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":"0.000055H","Power loss [W] of the coil":"380W","Operating voltage rated value":"500V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"220W","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=284150&mlfb=4EU3921-2AA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3921-2AA00-0A/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU3921-2AA00-0A and how do I get a price?","answer":"This part is sourced to order through independent distribution channels. Submit an RFQ; availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of 4EU3921-2AA00-0A?","answer":"3-phase commutating choke, 500V AC, 630A max / 567A rated continuous current, 0.000055H inductance, 4% voltage drop, 50Hz, thermal class H, IP00, with flat-type terminals for the main circuit."},{"question":"What is the physical size of 4EU3921-2AA00-0A?","answer":"Width 0.41m, height 0.385m, depth 0.229m. These are the external dimensions of the choke body; allow additional clearance for busbar connections and airflow around the IP00 core."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3921-2AA00-0A","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/4EU3921-2AA00-0A 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}}