{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3900-2US00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3900-2US00","canonicalUrl":"https://aoctrl.com/siemens/4EP3900-2US00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3900-2US00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP3900-2US00 mains choke (line reactor) for variable frequency drives, 3-phase, 480V AC, 80A max, 0.18mH, IP00, flat-type terminals.","salesMarkdown":"## Mains Choke for Variable Frequency Drives It's rated for 480V AC at 50/60 Hz with a maximum continuous current of 80A and an operational current of 72A per the datasheet conditions. The 0.18mH inductance with a 2% relative inductive voltage drop means it's sized to limit harmonic distortion and reduce dv/dt stress on the drive's input rectifier — a common requirement when the supply impedance is low or multiple drives share a bus. The 80A maximum current and 72A operational rating tell you this choke can handle a 75–80A VFD input continuously at 40°C ambient. The 2% voltage drop is typical for a 2% impedance line reactor — enough to clean up harmonics without dropping excessive voltage under load. The IP00 enclosure means it's open-frame; mount it inside a panel or enclosure that provides the physical and electrical protection. The flat-type terminals accept bus bar or crimp lugs — not screw-clamp wire connectors, so plan your termination method before panel assembly. ## Thermal and Loss Considerations Total power loss at rated conditions is 83.1W — 64.8W in the coil plus 18.3W in the iron core. That's the heat you need to extract from the enclosure; at 40°C ambient, the thermal class B insulation per IEC 60085 gives a 130°C hot-spot limit. The 0.123m depth, 0.219m width, and 0.179m height (–) define the mounting footprint — allow clearance around the open core for airflow.","metaTitle":"Siemens 4EP3900-2US00 Mains Choke, 3-Phase, 80A, 480V","metaDescription":"Siemens 4EP3900-2US00 mains choke for variable frequency drives. 3-phase, 80A max, 480V AC, 0.18mH, IP00. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.123m","Width":"0.219m","title":"4EP3900-2US00","Height":"0.179m","description":"MAINS CHOKE F.FU; PHASES:3; UN1(V):480; ITHMAX 1(A) / F1(HZ):80 /60; I LN (A):72; UK(%):2; LN(MH):0,176; TA/ISOKL:40 /B; IP00; TYPE OF TERMINALS:FLAT-TYPE TERMINAL; EN 61558-2-20 >UL/CSA-RECOGNIZED< >CHOKE<","Phase Number":"3","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Designation":"Netzdrossel f. FU","protection class IP":"IP00","current at AC maximum":"80A","Inductivity Rated Value":"0.00018H","power loss [W] of the coil":"64.8W","Operating Voltage Rated Value":"400, 480V","Ambient Temperature Rated Value":"40°C","Operating Frequency Rated Value":"50 ... 60Hz","power loss [W] of the iron core":"18.3W","thermal class acc. to IEC 60085":"B","operational current at AC rated value":"72A","Type Of Electrical Connection For Main Current Circuit":"flat connector","Relative Inductive Drop In Voltage For Rated Value Of The Current, Voltage And Frequency":"2%"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$422.91 – $539.75","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/28db5bf775ec3afbe81a431e6f693e6a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=83232&mlfb=4EP3900-2US00"},"ai":{"faq":[{"question":"Where can I buy 4EP3900-2US00 and how do I get a price?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is 4EP3900-2US00's listed depth?","answer":"The listed depth is 0.123m."},{"question":"What compliance documentation does this brand provide for 4EP3900-2US00?","answer":"The description notes the choke is recognized under UL/CSA and designed per EN 61558-2-20. RoHS and REACH compliance documentation is typically available from the manufacturer upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3900-2US00","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/4EP3900-2US00 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}