{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU5021-0AK10-0B","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU5021-0AK10-0B","canonicalUrl":"https://aoctrl.com/siemens/4EU5021-0AK10-0B","factsUrl":"https://aoctrl.com/api/mcp/products/4EU5021-0AK10-0B","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU5021-0AK10-0B commutating choke for converter, 3-phase, 2500 A rated current, 400 V AC, 50 Hz, 9.4 µH inductance, 4% relative inductive drop, IP00, thermal class H, UL/CSA recognized.","salesMarkdown":"## Commutating choke for converter duty The Siemens 4EU5021-0AK10-0B is a three-phase commutating choke (Kommutierungsdrossel) designed for converter applications. It carries a rated current of 2500 A at 400 V AC, 50 Hz, with a rated inductance of 9.4 µH and a relative inductive voltage drop of 4% at the measurement level. The 2500 A rating is the continuous thermal current (Ithmax) — the choke is sized for the full converter output, not a derated branch. ## Thermal class H and IP00 — what they mean for installation Thermal class H per IEC 60085 means the insulation system is rated for a 180 °C hot-spot temperature, which is necessary for high-current chokes where copper losses (1650 W in the coil) and iron losses (300 W) add up. The IP00 protection class means the choke has no enclosure — it is an open-frame component intended for mounting inside a switchgear cabinet or converter cubicle where personnel access is restricted. The flat-type terminals (flat connector) are sized for the 2500 A busbar connection; expect bolted joints with proper torque. ## Physical dimensions and panel fit The choke measures 0.565 m high, 0.518 m wide, and 0.318 m deep. At roughly half a meter per side, it requires a dedicated mounting footprint inside the cabinet — not a DIN-rail component. Verify the enclosure depth and busbar access before specifying; the flat-type terminals need clearance for bolted connections.","metaTitle":"Siemens 4EU5021-0AK10-0B Commutating Choke, 2500 A, 400 V, 5","metaDescription":"Siemens 4EU5021-0AK10-0B commutating choke for converter, 3-phase, 2500 A rated, 400 V AC, 50 Hz, 9.4 µH, IP00, thermal class H, UL/CSA recognized. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.318m","Width":"0.518m","Height":"0.565m","Maximum":"2 500A","Rated Value":"2 500A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.0000094H","Power loss [W] of the coil":"1 650W","Operating voltage rated value":"400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"300W","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=310259&mlfb=4EU5021-0AK10-0B","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU5021-0AK10-0B/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 4EU5021-0AK10-0B?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote."},{"question":"What compliance documentation does the 4EU5021-0AK10-0B carry?","answer":"The part is UL and CSA recognized per the product description, covering North American installations. It is designed per VDE 0532 (the German standard for power transformers and reactors)."},{"question":"What are the key ratings of the 4EU5021-0AK10-0B?","answer":"Rated current 2500 A, operating voltage 400 V AC, frequency 50 Hz, inductance 9.4 µH, relative inductive drop 4%, thermal class H (180 °C), IP00 open-frame construction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU5021-0AK10-0B","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/4EU5021-0AK10-0B 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}}