{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-3AA00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-3AA00","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-3AA00","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-3AA00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 4EU4521-3AA00 commutating choke for converter, 3-phase AC, 910A rated, 750V, 0.06 mH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU4521-3AA00 is a commutating choke (line reactor) designed for converter duty — it sits between the drive and the line to limit current rise, reduce harmonics, and protect the DC bus from line notching. Rated 910 A continuous at 750 V AC, three-phase, 50/60 Hz, with an inductance of 0.06 mH and a 4% relative inductive voltage drop at rated conditions. That 4% drop is the standard sizing for most drive applications — enough to smooth commutation without dragging down the bus voltage under load. The 910 A rating is the thermal continuous current (Ith) at 40 °C ambient — that's the current the choke can carry indefinitely without exceeding its thermal class H (180 °C) insulation. If your drive's line current is lower, the choke still works; if it's higher, you need a larger reactor. The DC rating is even higher at 1,115.1 A, which matters if you're using the choke on the DC link side of a converter. IP00 means it's an open-frame component — no enclosure. It's designed for mounting inside a cabinet where the panel provides the environmental protection. The flat-type terminals accept busbar or large cable lugs, typical for high-current power connections. Dimensions are 0.46 m wide × 0.435 m tall × 0.293 m deep — plan your gland plate and busbar clearance accordingly.","metaTitle":"Siemens 4EU4521-3AA00 Commutating Choke, 910A 750V 3-Phase A","metaDescription":"Siemens 4EU4521-3AA00 commutating choke for converter, 910A rated, 750V AC, 3-phase, 0.06 mH, IP00, thermal class H. 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":"910A","Rated Value":"910A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"1 115.1A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00006H","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=276783&mlfb=4EU4521-3AA00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-3AA00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU4521-3AA00 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What are the key ratings of 4EU4521-3AA00?","answer":"Rated 910 A continuous at 750 V AC, three-phase, 50/60 Hz, with 0.06 mH inductance and 4% voltage drop. DC rating is 1,115.1 A. Thermal class H insulation, IP00 open-frame, flat-type terminals."},{"question":"What is the physical size of 4EU4521-3AA00?","answer":"Width 0.46 m, height 0.435 m, depth 0.293 m. Plan cabinet space accordingly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-3AA00","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/4EU4521-3AA00 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}}