{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU2521-5DA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU2521-5DA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU2521-5DA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU2521-5DA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU2521-5DA00-0A commutating choke (line reactor) for converter drives, 3-phase, 380V AC, 175A max / 158A rated, 0.16 mH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU2521-5DA00-0A is a commutating choke for converter drives — a 3-phase line reactor rated 380 V AC with a maximum continuous current of 175 A and a rated current of 158 A. This is the current-limiting element that sits between the AC supply and a variable-frequency drive or DC drive input — without it, the converter's switching transients can weld contactors and blow upstream fuses. The 175 A maximum governs the upstream MCCB or fuse sizing, not the motor full-load amps; the choke's own thermal capacity sets the floor. Three-phase, 380 V AC, 50 Hz. The 0–50 Hz operating frequency range means it is designed for standard line frequency — not for the variable output of a VFD. At DC, the rated value is 214.4 A — this matters if the choke is used on the DC link of a drive, but the primary application is AC line side. Thermal class H per IEC 60085 means the insulation system withstands 180 °C hot-spot temperature — standard for converter-duty reactors that see harmonic heating. The total power loss splits between the coil (105 W) and the iron core (70 W); plan for 175 W of heat rejection inside the enclosure. IP00 means no ingress protection — this is an open-frame component for a clean, dry cabinet, not for outdoor or washdown duty. ## Integration and deployment Mounting dimensions: 0.225 m wide, 0.21 m tall, 0.16 m deep. This is a panel-mount component — no DIN rail clip. The flat-type terminals accept busbar or cable lug connections; plan for 0.2–0.5 m of clearance above and below for airflow and lug access. In a 380 V drive cabinet, this choke typically mounts between the input circuit breaker and the drive input terminals.","metaTitle":"Siemens 4EU2521-5DA00-0A Commutating Choke, 175A 3-Phase","metaDescription":"Siemens 4EU2521-5DA00-0A commutating choke for converter drives. 175A max, 158A rated, 380V AC, 0.16 mH, IP00. Mature lifecycle; sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.16m","Width":"0.225m","Height":"0.21m","Maximum":"175A","Rated Value":"158A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"214.4A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00016H","Power loss [W] of the coil":"105W","Operating voltage rated value":"380V","Ambient temperature rated value":"40°C","Operating frequency rated value":"0 ... 50Hz","Power loss [W] of the iron core":"70W","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=535232&mlfb=4EU2521-5DA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU2521-5DA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 4EU2521-5DA00-0A commutating choke?","answer":"Three-phase, 380 V AC, 50 Hz, 175 A maximum continuous current, 158 A rated current, 0.16 mH inductance, 4% voltage drop, IP00 enclosure, thermal class H insulation."},{"question":"Where can I buy the 4EU2521-5DA00-0A?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU2521-5DA00-0A","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/4EU2521-5DA00-0A 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}}