{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3901-4DS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3901-4DS00","canonicalUrl":"https://aoctrl.com/siemens/4EP3901-4DS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3901-4DS00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP3901-4DS00 commutating choke for converters, 3-phase, 400 V AC, 56 A max, 0.4 mH, 4% voltage drop, IP00, flat-type terminals.","salesMarkdown":"Its 56 A maximum continuous current and 50.4 A rated current define the thermal limit for the load side — size the upstream converter and cabling for at least this continuous current. The 0.4 mH inductance with a 4% relative inductive voltage drop means this choke limits di/dt and reduces harmonic distortion on the converter's DC link; the 4% drop is typical for moderate smoothing without excessive voltage sag under load. The 70 A peak current rating handles short-duration inrush or transient events without saturating the core. ## Deployment context This is an open-frame (IP00) component — no enclosure, so it mounts inside a panel or cabinet where the ambient temperature stays at or below 40 °C. The flat-type terminals accept busbar or cable lugs; plan for panel wiring with adequate clearance around the 0.219 m width and 0.123 m depth. Thermal class B insulation per IEC 60085 means the winding withstands 130 °C hot-spot temperature — adequate for continuous duty in a ventilated enclosure. The 70.6 W coil power loss plus 15.7 W iron-core loss total about 86 W of heat to vent; factor that into the cabinet's thermal budget.","metaTitle":"Siemens 4EP3901-4DS00 Commutating Choke, 56 A, 0.4 mH","metaDescription":"Siemens 4EP3901-4DS00 commutating choke for converters. 3-phase, 400 V AC, 56 A max, 0.4 mH, 4% voltage drop. UL/CSA recognized. Mature lifecycle, quoted to order.","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":"56A","Rated Value":"50.4A","Peak current":"70A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"68.6A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.0004H","Power loss [W] of the coil":"70.6W","Operating voltage rated value":"400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"15.7W","Thermal class acc. to IEC 60085":"B","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=69325&mlfb=4EP3901-4DS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3901-4DS00/alternatives.json"},"ai":{"faq":[{"question":"What approvals does 4EP3901-4DS00 carry?","answer":"It is UL/CSA recognized under EN 61558-2-20, covering safety for power transformers and chokes."},{"question":"What are the key electrical ratings for 4EP3901-4DS00?","answer":"3-phase, 400 V AC, 50 Hz, 56 A maximum continuous current, 50.4 A rated current, 0.4 mH inductance, 4% voltage drop, 70 A peak current."},{"question":"Where can I buy 4EP3901-4DS00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3901-4DS00","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/4EP3901-4DS00 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}}