{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3921-1AA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3921-1AA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3921-1AA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3921-1AA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 4EU3921-1AA00-0A commutating choke for converter, 3-phase, 400V AC, rated 900A (max 1000A), 27µH, IP00, flat-type terminals.","salesMarkdown":"## Commutating Choke for Converter Duty — 900 A, 400 V AC, 3-Phase The Siemens 4EU3921-1AA00-0A is a 3-phase commutating choke (line reactor) designed for converter front ends, rated at 900 A continuous with a maximum of 1 000 A at 400 V AC, 50 Hz. The 27 µH inductance limits di/dt and reduces harmonic distortion on the drive input, with a relative inductive voltage drop of 4 % at rated current — a standard value for line reactors in industrial converter applications. ## Power Loss and Thermal Class Total power loss is 637 W — 360 W in the coil and 277 W in the iron core — at the rated 40 °C ambient. The winding is Class H insulation per IEC 60085, rated for a 180 °C hot-spot temperature, which provides margin in a warm cabinet or near a converter heatsink. ## IP00 — Open Construction, Panel Integration Rated IP00 with no enclosure — this choke is intended for mounting inside a switchgear cubicle or drive cabinet where the enclosure provides the environmental seal. The flat-type terminals accept busbar or lug connections for the main current circuit. Dimensions are 0.41 m wide by 0.385 m tall by 0.229 m deep; plan for adequate clearance around the iron core for airflow and convection cooling. ## Lifecycle Status and Sourcing","metaTitle":"Siemens 4EU3921-1AA00-0A Commutating Choke, 900A/1000A, 400V","metaDescription":"Siemens 4EU3921-1AA00-0A commutating choke for converter applications. 3-phase, 400V AC, rated 900A (max 1000A), 27µH, IP00. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.229m","Width":"0.41m","Height":"0.385m","Maximum":"1 000A","Rated Value":"900A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"1 225.4A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000027H","Power loss [W] of the coil":"360W","Operating voltage rated value":"400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"277W","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=39463&mlfb=4EU3921-1AA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3921-1AA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of 4EU3921-1AA00-0A?","answer":"3-phase commutating choke rated 900 A continuous (max 1 000 A) at 400 V AC, 50 Hz, with 27 µH inductance and a 4 % voltage drop. Total power loss is 637 W at 40 °C ambient, Class H insulation."},{"question":"Where can I buy 4EU3921-1AA00-0A?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"Will 4EU3921-1AA00-0A drop into a panel specified around 3RV6011-0CA10?","answer":"No — the 3RV6011-0CA10 is a motor-protective circuit breaker (SIRIUS S00, 0.25 A, DIN-rail mount), while the 4EU3921-1AA00-0A is a 900 A converter choke with flat-type terminals and open-frame construction. They serve entirely different functions and panel locations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3921-1AA00-0A","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/4EU3921-1AA00-0A 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}}