{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU5021-0AF10-0B","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU5021-0AF10-0B","canonicalUrl":"https://aoctrl.com/siemens/4EU5021-0AF10-0B","factsUrl":"https://aoctrl.com/api/mcp/products/4EU5021-0AF10-0B","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON Netzdrossel mains choke, 4EU5021-0AF10-0B, 350 A rated current, 690 V AC, 0.35 mH, 50 Hz, IP00, thermal class H, flat connector terminals.","salesMarkdown":"## What this mains choke does in the panel The Siemens 4EU5021-0AF10-0B is a three-phase mains choke (Netzdrossel) rated for 350 A continuous at 690 V AC, 50 Hz, with 0.35 mH inductance. It sits between the supply and the drive input to smooth line harmonics, limit inrush current, and provide a defined inductive voltage drop of 12.5% at rated current and frequency. The IP00 enclosure means it's an open-frame component intended for inside a cabinet — no washdown rating, no outdoor mounting. Thermal class H insulation (180°C continuous) gives it headroom for high-ambient or overload conditions up to 40°C ambient. Main circuit connections are flat copper busbar terminals, so plan for busbar or cable lug interfaces, not screw-clamp wiring. That's the figure to match against your drive's input current — not the motor FLA. The 0.35 mH inductance at 12.5% voltage drop is typical for a 3% impedance reactor at this current class; it's sized to limit di/dt and reduce harmonic distortion without dropping excessive voltage under load. The physical footprint is substantial: 0.518 m wide, 0.565 m tall, 0.318 m deep. That's a 19-inch rack width and roughly half a meter of panel height — verify your enclosure backplate has the real estate before committing. The flat connector interface means you're running busbar or compression lugs, not ring terminals on a DIN rail. Mounting is via the chassis frame — no DIN rail clip, no snap-on. Plan for adequate ventilation around the IP00 core; thermal class H allows 180°C winding temperature, but the surrounding components need clearance. The 0.318 m depth means it won't fit a shallow enclosure — verify door clearance with the gland plate and any front-mounted devices.","metaTitle":"Siemens 4EU5021-0AF10-0B Netzdrossel Mains Choke, 350A, 690V","metaDescription":"Siemens 4EU5021-0AF10-0B mains choke rated 350A at 690V AC, 50Hz, 0.35mH. IP00, thermal class H, flat connector terminals. 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":"350A","Rated Value":"350A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel","Protection class IP":"IP00","Inductivity rated value":"0.00035H","Operating voltage rated value":"690V","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":"12.5%"}},"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=171106&mlfb=4EU5021-0AF10-0B","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU5021-0AF10-0B/alternatives.json"},"ai":{"faq":[{"question":"Will 4EU5021-0AF10-0B drop into a panel specified for 3RV6011-0CA10?","answer":"No. The 3RV6011-0CA10 is a SIRIUS motor-protective circuit breaker rated 0.25 A, DIN-rail mounted, 45 mm wide — a completely different class and current range. The 4EU5021-0AF10-0B is a 350 A mains choke with a 0.518 m width and flat busbar connections. No physical or electrical interchangeability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU5021-0AF10-0B","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/4EU5021-0AF10-0B 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}}