{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-0BM10","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-0BM10","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-0BM10","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0BM10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 4EU4521-0BM10 commutating choke for converter, 3-phase, 804 A rated current, 830 V AC, 50 Hz, IP00, Class H insulation, flat-type terminals.","salesMarkdown":"The Siemens 4EU4521-0BM10 is a commutating choke (line reactor) designed for the DC link or AC input of a three-phase converter drive. It smooths current ripple and limits di/dt during commutation, protecting the converter's semiconductor switches. Rated 804 A continuous at 830 V AC, 50 Hz, with an inductance of 0.061 mH and a relative inductive voltage drop of 4 % at rated current — sized for a heavy-duty drive line. The 804 A rating is the continuous thermal current (Ith) at 40 °C ambient; derate for higher ambient or non-sinusoidal waveforms. The 4 % voltage drop means the choke is a standard impedance match for most 400–690 V class drives — it won't starve the DC bus of voltage under load. IP00 open-frame construction — no enclosure, no touch protection. Must be mounted inside a cabinet with appropriate clearance to grounded metal and live parts. Footprint 0.46 m wide × 0.435 m tall × 0.293 m deep; flat-type terminals for the main circuit accept busbar or large cable lugs. Plan for bottom-entry cabling or busbar drop from the converter output. Class H insulation (180 °C thermal class per IEC 60085) means the choke can run hot without degrading the winding — typical for high-current line reactors in continuous-duty drives. Still, keep the ambient below 40 °C for full 804 A rating.","metaTitle":"Siemens 4EU4521-0BM10 Commutating Choke, 804 A / 830 V, 50 H","metaDescription":"Siemens 4EU4521-0BM10 commutating choke for converter, 3-phase, 804 A rated, 830 V AC, 50 Hz, IP00, Class H insulation. Available to order — RFQ for pricing.","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":"804A","Rated Value":"804A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"985.2A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000061H","Operating voltage rated value":"830V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","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=178019&mlfb=4EU4521-0BM10","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0BM10/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 4EU4521-0BM10?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time; the part is sourced to order through independent distribution channels."},{"question":"What is the footprint of 4EU4521-0BM10?","answer":"The choke measures 0.46 m wide × 0.435 m tall × 0.293 m deep, with flat-type terminals for the main circuit."},{"question":"What is the 804 A rating based on?","answer":"The 804 A is the continuous thermal current (Ith) at 40 °C ambient, 50 Hz, with a 4 % inductive voltage drop. It is also the rated current for the DC link application."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-0BM10","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/4EU4521-0BM10 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}}