{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU5021-0AE10-0B","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU5021-0AE10-0B","canonicalUrl":"https://aoctrl.com/siemens/4EU5021-0AE10-0B","factsUrl":"https://aoctrl.com/api/mcp/products/4EU5021-0AE10-0B","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS Netzdrossel mains choke, 4EU5021-0AE10-0B, 350 A rated, 690 V AC, 50 Hz, 0.35 mH, IP00, thermal class H, flat connector.","salesMarkdown":"The Siemens 4EU5021-0AE10-0B is a Netzdrossel — a three-phase mains choke (line reactor) rated for 350 A continuous at 690 V AC, 50 Hz. Its 0.35 mH inductance with a 12.5% relative inductive voltage drop at rated current and frequency means it limits harmonic currents and smooths line-side transients for a 3-phase drive or converter input. The IP00 open-frame construction and flat-type main-circuit connectors suit it for installation inside a cabinet where the enclosure provides the environmental seal. The 350 A continuous rating at 690 V AC sets the line-side current it can carry without saturating the core. That 12.5% voltage drop at rated current is the impedance the choke presents to the line — enough to attenuate common harmonics from a 6-pulse rectifier (typically 5th and 7th) without dropping excessive voltage under load. Thermal class H (180 °C insulation) means the winding can survive sustained overloads that would degrade a class F or B choke; the 40 °C ambient rating is the reference, and derating applies above that. ## Deployment context This choke mounts into a panel or enclosure via its frame — no DIN-rail clip, so plan for bolted installation. The flat connectors for the main circuit accept busbar or cable lugs; the IP00 rating means the cabinet must provide the ingress protection. It is sized for a 350 A drive line-up on a 690 V three-phase system, common in marine, mining, or heavy industrial installations where harmonic mitigation is required before the drive input.","metaTitle":"Siemens 4EU5021-0AE10-0B Mains Choke, 350 A, 690 V, 50 Hz","metaDescription":"Siemens 4EU5021-0AE10-0B Netzdrossel mains choke, 350 A rated, 690 V AC, 50 Hz, 0.35 mH, IP00, thermal class H. Sourced to order against an 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=502028&mlfb=4EU5021-0AE10-0B","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU5021-0AE10-0B/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU5021-0AE10-0B?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings for 4EU5021-0AE10-0B?","answer":"It is a three-phase mains choke rated for 350 A continuous at 690 V AC, 50 Hz, with 0.35 mH inductance and a 12.5% relative inductive voltage drop at rated current and frequency. Thermal class H insulation and IP00 open-frame construction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU5021-0AE10-0B","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/4EU5021-0AE10-0B 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}}