{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-0UB10-0B","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-0UB10-0B","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-0UB10-0B","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0UB10-0B","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4521-0UB10-0B Netzdrossel f. FU, 3-phase, 690 V AC, 2000 A, 50 Hz, 2% voltage drop, IP00, flat-type terminals.","salesMarkdown":"## Mains choke for 2000 A frequency converter lines The Siemens 4EU4521-0UB10-0B is a three-phase mains choke (Netzdrossel f. FU) rated for 2000 A continuous at 690 V AC, 50 Hz. It is designed to sit between the supply and a frequency converter drive, limiting harmonic distortion and reducing voltage notching on the line side. The 2000 A rating (both maximum and rated value) sets the continuous current capacity — this choke is sized for large drives, typically 800 kW to 1 MW class on 690 V systems. The 690 V operating voltage covers 400 V and 690 V line supplies common in European industrial networks. Inductance is 13 µH (0.000013 H), which combined with the 2 % voltage drop gives the impedance needed to limit di/dt and reduce harmonic currents from the drive's rectifier stage. Total power loss is 980 W (680 W coil loss + 300 W iron core loss) at 40 °C ambient. This heat must be dissipated — the IP00 open-frame construction means no enclosure; the choke relies on the panel's forced ventilation or natural convection. Class H insulation (180 °C rated) per IEC 60085 gives thermal headroom for overloads and high ambient temperatures inside the cabinet. Dimensions are 0.460 m wide × 0.435 m high × 0.293 m deep — a substantial footprint requiring a floor-mount or heavy-duty shelf inside the panel. Main circuit connections use flat-type terminals (busbar or large cable lug interface), not spring-cage or screw clamps. The IP00 rating means no ingress protection; install in a clean, dry cabinet with adequate clearance for airflow and arc-flash boundaries.","metaTitle":"Siemens 4EU4521-0UB10-0B Mains Choke, 2000 A, 690 V, 3-Phase","metaDescription":"Siemens 4EU4521-0UB10-0B mains choke for frequency converters. 2000 A rated, 690 V AC, 3-phase, 50 Hz, 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":"0.293m","Width":"0.46m","Height":"0.435m","Maximum":"2 000A","Rated Value":"2 000A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel f. FU","Protection class IP":"IP00","Inductivity rated value":"0.000013H","Power loss [W] of the coil":"680W","Operating voltage rated value":"690V","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":"2%"}},"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=500341&mlfb=4EU4521-0UB10-0B","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0UB10-0B/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 4EU4521-0UB10-0B mains choke?","answer":"It is a 3-phase choke rated 2000 A at 690 V AC, 50 Hz, with 13 µH inductance and a 2 % voltage drop. Total power loss is 980 W at 40 °C ambient."},{"question":"Where can I buy the 4EU4521-0UB10-0B and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote."},{"question":"What is the physical size of the 4EU4521-0UB10-0B?","answer":"The choke measures 0.460 m wide × 0.435 m high × 0.293 m deep."},{"question":"Will the 4EU4521-0UB10-0B drop into a panel specified around a 5SJ6463-7?","answer":"No — the 5SJ6463-7 is a SENTRON miniature circuit breaker (63 A, 4-pole, DIN-rail mount), a completely different class and current rating. The 4EU4521-0UB10-0B is a 2000 A mains choke with flat-type terminals, requiring busbar connections and a floor-mount footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-0UB10-0B","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/4EU4521-0UB10-0B 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}}