{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3921-0BT10-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3921-0BT10-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3921-0BT10-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3921-0BT10-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU3921-0BT10-0A commutating choke for converter, 3-phase, 480V AC, rated 540A, max 600A, IP00, Class H insulation.","salesMarkdown":"The Siemens 4EU3921-0BT10-0A is a 3-phase commutating choke for converter applications, rated 540 A continuous with a 600 A maximum at 60 Hz. It operates on 480 V AC and is designed to limit current rise and reduce harmonic distortion on the DC link of a variable-speed drive or rectifier. The 0.079 mH inductance and 6.85% relative inductive voltage drop define the commutation notch smoothing — sized for a converter line-up where the choke sits between the supply and the input bridge. This is an open-frame (IP00) component, so it requires installation inside a cabinet with proper clearance for heat dissipation. The 524 W coil loss plus 254 W iron core loss total 778 W at rated load — that heat must be vented. Class H insulation (180 °C thermal class per IEC 60085) gives headroom for high ambient temperatures up to 40 °C rated ambient, but the enclosure must still manage the thermal load. The 540 A rated current (600 A max) is the continuous thermal current (Ith) at 40 °C ambient — derate if your cabinet ambient exceeds that. The 735.2 A DC rating tells you the choke can handle the DC-side ripple current in a 6-pulse converter, but the AC-side 540 A is the binding number for cable sizing and upstream breaker coordination. The 0–60 Hz operating frequency range covers 50 Hz and 60 Hz line supplies. The 6.85% voltage drop at rated current is the impedance that shapes the commutation notch — if your drive manufacturer specifies a different percent impedance, this choke may not provide the expected harmonic attenuation. Verify the drive manual's line reactor recommendation before committing the BOM line. Flat-type connectors require a specific busbar or cable lug interface. If your existing panel uses ring terminals or M10 studs, you will need an adapter kit. The 0.229 m depth and 0.41 m width mean it occupies a substantial footprint — plan for side clearance to allow airflow and connector access.","metaTitle":"Siemens 4EU3921-0BT10-0A Commutating Choke, 540A, 480V AC","metaDescription":"Siemens 4EU3921-0BT10-0A commutating choke for converter, 3-phase, 540A rated, 600A max, 480V AC, IP00, Class H insulation. 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":"600A","Rated Value":"540A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"735.2A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000079H","Power loss [W] of the coil":"524W","Operating voltage rated value":"0, 480V","Ambient temperature rated value":"40°C","Operating frequency rated value":"0 ... 60Hz","Power loss [W] of the iron core":"254W","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":"6.85%"}},"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=363620&mlfb=4EU3921-0BT10-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3921-0BT10-0A/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3921-0BT10-0A","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/4EU3921-0BT10-0A 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}}