{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-0AL00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-0AL00","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-0AL00","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0AL00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4521-0AL00 commutating choke for converters, 3-phase, 400V AC, 1640A rated current, 0.017mH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU4521-0AL00 is a 3-phase commutating choke (Kommut.-Drossel f. Stromrichter) sized for converter output circuits. It carries a rated continuous current of 1640 A at 400 V AC, with an inductance of 0.017 mH (17 µH). That inductance value is deliberately low — it's not a line-reactor for harmonic filtering; it's a fast-saturating choke that limits the di/dt during thyristor or IGBT commutation events in the converter bridge. The IP00 rating means it's an open-frame component — no enclosure, no finger-safe guarding. It goes inside a converter cabinet or a dedicated panel section where the upstream IP rating handles the environment. That's the current the choke can carry without exceeding its Class H insulation temperature rise (180 °C hot-spot per IEC 60085). In practice, if your converter's output RMS current hits 1640 A at 40 °C ambient, this choke is thermally matched. Above that ambient, derate per the winding thermal curve — Class H gives headroom, but the iron-core losses (435 W) are fixed with voltage and frequency, so the total loss doesn't scale linearly with load. The DC rated value of 2009.8 A is a separate figure: it tells you the choke can handle a DC current component that high, which matters for six-pulse or twelve-pulse rectifier circuits where the DC link ripple current flows through the commutation path.","metaTitle":"4EU4521-0AL00 Siemens Commutating Choke, 1640A, 0.017mH","metaDescription":"Siemens 4EU4521-0AL00 3-phase commutating choke for converters. Rated 1640A at 400V AC, 0.017mH, IP00. Mature lifecycle; available to order. Request a 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":"1 640A","Rated Value":"1 640A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"2 009.8A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000017H","Power loss [W] of the coil":"700W","Operating voltage rated value":"400, 400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"60 ... 50Hz","Power loss [W] of the iron core":"435W","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=288731&mlfb=4EU4521-0AL00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0AL00/alternatives.json"},"ai":{"faq":[{"question":"What is the physical size of the 4EU4521-0AL00?","answer":"Width is 0.46 m, height is 0.435 m, and depth is 0.293 m. Protection class is IP00 (open frame)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-0AL00","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/4EU4521-0AL00 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}}