{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-2AA00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-2AA00","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-2AA00","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-2AA00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4521-2AA00, 3-phase commutating choke for converter, 750 V AC, 800 A, 68 µH, IP00, flat-type terminals.","salesMarkdown":"It sits between the supply and the converter's input, smoothing current ripple and limiting fault-current rise rates. Rated for continuous 800 A at 750 V AC, it's built for heavy industrial drives and power conversion stages where the line-side harmonics or commutation notches need iron-core damping. The core inductance is 68 µH (0.000068 H) with a relative inductive voltage drop of 4% at rated current and frequency — that's the design spec that governs how much line-side voltage sag the choke introduces. At 800 A and 50/60 Hz, that 4% drop is the trade-off for the current-limiting and harmonic attenuation you get. Total power loss comes to about 904 W — 500 W in the coil and 404 W in the iron core — all dissipated as heat at 40 °C ambient. That's not a small number; the panel builder needs to account for that thermal load in the enclosure's ventilation or forced-air cooling. The 4EU4521-2AA00 measures 0.460 m wide by 0.435 m tall by 0.293 m deep — roughly 18 by 17 by 11.5 inches. It's an open-frame (IP00) assembly, so it's meant for installation inside a ventilated cabinet, not out on the plant floor where dust or washdown would get to it. The main current circuit connects via flat-type terminals, which means bus-bar or heavy cable lugs, not screw-clamp blocks. Thermal class H per IEC 60085 means the insulation system can handle 180 °C hot-spot temperature — that's the margin that lets this choke run hard in a 40 °C ambient without cooking the windings. It's a standard spec for industrial converter-duty reactors.","metaTitle":"Siemens 4EU4521-2AA00 Commutating Choke, 800 A, 750 V AC","metaDescription":"Siemens 4EU4521-2AA00 3-phase commutating choke for converters. Rated 800 A at 750 V AC, 68 µH, IP00. Mature lifecycle; available to order. Request quote.","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":"800A","Rated Value":"800A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"980.3A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000068H","Power loss [W] of the coil":"500W","Operating voltage rated value":"750, 750V","Ambient temperature rated value":"40°C","Operating frequency rated value":"60 ... 50Hz","Power loss [W] of the iron core":"404W","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=33426&mlfb=4EU4521-2AA00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-2AA00/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 4EU4521-2AA00?","answer":"Submit an RFQ through this listing. We source the 4EU4521-2AA00 through independent distribution channels and confirm pricing and availability at quote time — no automated stock numbers here, just a real quote against your order quantity and delivery window."},{"question":"What are the key ratings for 4EU4521-2AA00?","answer":"The 4EU4521-2AA00 is a 3-phase AC commutating choke rated for 800 A continuous at 750 V AC, with 68 µH inductance and a 4% relative inductive voltage drop. Total power loss is approximately 904 W at 40 °C ambient."},{"question":"What is the physical size of 4EU4521-2AA00?","answer":"The choke measures 0.460 m wide by 0.435 m tall by 0.293 m deep. It is an IP00 open-frame design with flat-type terminals for the main circuit connections."},{"question":"What compliance documentation does Siemens provide for 4EU4521-2AA00?","answer":"The part is built to VDE 0532 (the standard for power transformers and reactors) and uses Class H insulation per IEC 60085. For specific RoHS, REACH, or UL documentation, the manufacturer's standard declaration pack applies — confirm at quote time if you need a specific cert for your compliance gate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-2AA00","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/4EU4521-2AA00 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}}