{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3801-1US00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3801-1US00","canonicalUrl":"https://aoctrl.com/siemens/4EP3801-1US00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3801-1US00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP3801-1US00 mains choke (Netzdrossel f. FU), 3-phase, 40.5A rated, 400/480V AC, 50-60 Hz, IP00, screw terminals.","salesMarkdown":"## What this choke does in the drive line The Siemens 4EP3801-1US00 is a three-phase mains choke (Netzdrossel f. FU) sized for variable-frequency drive inputs. It sits between the supply and the drive rectifier, limiting harmonic current and reducing the voltage-notch stress on the DC bus. Rated 40.5 A continuous (45 A max) at 400/480 V AC, 50-60 Hz, with a 2 % relative inductive voltage drop at rated current and an inductance of 0.31 mH. That 2 % drop is the design sweet spot — it knocks down the dominant harmonics without dragging the DC bus voltage down enough to trigger undervoltage on the drive. The 57 W copper loss plus 12 W core loss (69 W total at 40 °C ambient) means this choke needs free air around it; IP00 tells you it's an open-frame component for enclosure mounting, not a standalone box. Footprint is 0.178 m wide × 0.153 m tall × 0.12 m deep. Thermal class B (130 °C) per IEC 60085, so the winding insulation holds up under the 69 W total loss at 40 °C ambient. In a typical panel, leave a few centimetres around the choke for convection; the iron core runs warm, not hot. UL/CSA recognized per EN 61558-2-20, which covers the safety isolation and thermal-rise testing for this class of choke.","metaTitle":"Siemens 4EP3801-1US00 Mains Choke, 40.5A, 3-Phase, 400/480V","metaDescription":"Siemens 4EP3801-1US00 mains choke for VFD, 40.5A rated, 3-phase, 400/480V AC, 50-60 Hz, IP00, screw 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":"0.12m","Width":"0.178m","Height":"0.153m","Maximum":"45A","Rated Value":"40.5A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel f. FU","Protection class IP":"IP00","Inductivity rated value":"0.00031H","Power loss [W] of the coil":"57W","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":"12W","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":"2%"}},"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=336427&mlfb=4EP3801-1US00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3801-1US00/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 4EP3801-1US00?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through our independent distribution network."},{"question":"What compliance documentation does Siemens provide for 4EP3801-1US00?","answer":"The choke is UL/CSA recognized and built to EN 61558-2-20. Standard Siemens documentation includes the declaration of conformity for the Low Voltage Directive; RoHS and REACH declarations are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3801-1US00","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/4EP3801-1US00 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}}