{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3900-1DS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3900-1DS00","canonicalUrl":"https://aoctrl.com/siemens/4EP3900-1DS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3900-1DS00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP3900-1DS00 commutating choke for converters, 3-phase, 500 V AC, 36 A rated (40 A max), 0.92 mH, IP00, screw terminals.","salesMarkdown":"The Siemens 4EP3900-1DS00 is a commutating choke (line reactor) designed for converter applications — specifically to limit di/dt and smooth the DC-link current in variable-speed drives and rectifier front-ends. It handles 3-phase AC at 500 V, rated 36 A continuous with a 40 A maximum, and delivers 0.92 mH inductance per phase. IP00 means it's an open-frame component — no enclosure, no finger-safe protection. It mounts inside a cabinet, typically on a base plate or chassis, not on a DIN rail. The 0.219 m width, 0.179 m height, and 0.123 m depth define the space you need to allocate in the panel layout; allow extra clearance for airflow and the screw-type terminals on the main circuit connections. The thermal class B insulation per IEC 60085 means the winding can sustain 130 °C hot-spot temperature continuously — adequate for a 40 °C ambient with the 70 W coil loss and 22.3 W iron-core loss dissipated through natural convection. If your ambient exceeds 40 °C, derate current or force air. ## DC-link and converter duty The same choke also carries a DC rated value of 49 A, which means it can be used on the DC side of a converter — for example, as a smoothing reactor in the DC link of a 6-pulse rectifier. The 0.92 mH inductance at 50 Hz is typical for a 36 A drive input reactor; it provides enough impedance to limit peak currents during commutation and reduce the harmonic content drawn from the supply. The 4 % voltage drop is a standard figure for line reactors in this class — high enough to be effective, low enough not to starve the drive of voltage under load.","metaTitle":"Siemens 4EP3900-1DS00 Commutating Choke, 3-Phase 500V 36A","metaDescription":"Siemens 4EP3900-1DS00 commutating choke for converters. 3-phase, 500V AC, 36A rated (40A max), 0.92 mH, IP00, screw terminals. Mature lifecycle; sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.123m","Width":"0.219m","Height":"0.179m","Maximum":"40A","Rated Value":"36A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"49A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00092H","Power loss [W] of the coil":"70W","Operating voltage rated value":"500V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"22.3W","Thermal class acc. to IEC 60085":"B","Type of electrical connection for main current circuit":"screw-type terminals","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=225138&mlfb=4EP3900-1DS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3900-1DS00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EP3900-1DS00 and how is it quoted?","answer":"The 4EP3900-1DS00 is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time, not on a public listing."},{"question":"What are the key electrical ratings of 4EP3900-1DS00?","answer":"3-phase AC, 500 V, 36 A rated (40 A max), 0.92 mH inductance, 4 % voltage drop at 50 Hz. DC rating is 49 A. Thermal class B, 40 °C ambient, 70 W coil loss plus 22.3 W iron loss."},{"question":"What is the physical size of 4EP3900-1DS00?","answer":"Width 0.219 m, height 0.179 m, depth 0.123 m. IP00 open-frame with screw terminals for main circuit connections."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3900-1DS00","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/4EP3900-1DS00 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}}