{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-0BL10","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-0BL10","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-0BL10","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0BL10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4521-0BL10 commutating choke (line reactor) for converter applications, three-phase AC, 500 VAC rated voltage, 2250 A rated current, 13 µH inductance, 4% relative inductive drop, IP00 open-frame, 1080 W total power loss, thermal class H.","salesMarkdown":"The Siemens 4EU4521-0BL10 is a three-phase commutating choke (line reactor) for converter applications, rated 2250 A at 500 VAC, 50 Hz. The 13 µH inductance and 4% relative inductive drop are sized to limit di/dt and reduce harmonic stress on the converter's semiconductor switches — critical when the drive is feeding a high-current motor load or when multiple drives share a common DC bus. This is a heavy-current, open-frame (IP00) component, so it lives inside a ventilated cabinet; no washdown tolerance, no touch-safe enclosure. Thermal class H (IEC 60085) means the winding insulation withstands 180 °C hotspot temperature, which aligns with the 1080 W total power loss (680 W copper + 400 W iron) at the 40 °C ambient rating. The 2250 A rated current is the thermal continuous current (Ith) at 50 Hz — this is not a short-time rating; it governs the conductor sizing, busbar connections, and cabinet cooling. The flat-type terminals accept busbar or large cable lugs; plan for bolted connections, not spring clamps. The 4% relative inductive drop (Uk) is measured at rated current, voltage, and frequency — it tells you the voltage drop across the choke at full load, which is the design parameter for the converter's DC-link voltage margin. If your drive is already at the upper end of its input voltage tolerance, a 4% drop is significant; verify the converter's minimum operating voltage before committing. The 0.293 m depth × 0.46 m width × 0.435 m height footprint is a floor-standing or bracket-mount package — no DIN rail, no panel cutout. IP00 means no ingress protection; the choke must be installed in a clean, dry, ventilated enclosure with clearance for airflow around the 1080 W heat dissipation. The 2250 A DC rated value (2757.3 A) is the continuous DC current the choke can carry when used in a DC-link application — higher than the AC rating because there is no skin effect or core loss from AC magnetization. If you are placing this choke in the DC link of a large drive, that is the number to size your busbars and fuse protection against.","metaTitle":"Siemens 4EU4521-0BL10 Commutating Choke, 2250 A, 500 VAC, 13","metaDescription":"Siemens 4EU4521-0BL10 commutating choke for converters. 2250 A rated, 500 VAC, 13 µH, 50 Hz. IP00 open frame. Mature lifecycle; sourced to order. Request RFQ for current 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":"2 250A","Rated Value":"2 250A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"2 757.3A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000013H","Power loss [W] of the coil":"680W","Operating voltage rated value":"500V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"400W","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=153938&mlfb=4EU4521-0BL10","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0BL10/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 4EU4521-0BL10 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 — standard practice for a 2250 A reactor that ships on a production batch."},{"question":"What are the key specifications of the 4EU4521-0BL10?","answer":"Three-phase commutating choke rated 2250 A at 500 VAC, 50 Hz, 13 µH inductance, 4% relative inductive drop, 1080 W total power loss at 40 °C ambient, thermal class H, IP00 open frame, flat-type terminals."},{"question":"What is the physical size of the 4EU4521-0BL10?","answer":"Depth 0.293 m, width 0.46 m, height 0.435 m. It is a floor-standing or bracket-mount package, not a DIN-rail component."},{"question":"What compliance documentation is available for the 4EU4521-0BL10?","answer":"The part is designed to VDE 0532 (the transformer/reactor standard). Thermal class H per IEC 60085. The spec sheet does not list RoHS, REACH, or UL marks — confirm with the RFQ if these are required for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-0BL10","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/4EU4521-0BL10 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}}