{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3905-0BK00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3905-0BK00","canonicalUrl":"https://aoctrl.com/siemens/4EP3905-0BK00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3905-0BK00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP3905-0BK00 Netzdrossel f. FU, 3-phase mains choke for VFD, 460V AC, rated 19.8A / max 22A, 1.6 mH, 5% voltage drop, IP00, screw terminals.","salesMarkdown":"The Siemens 4EP3905-0BK00 is a three-phase mains choke designed for the input side of a variable-frequency drive (VFD). It smooths the line current, limits harmonic distortion, and provides a measure of protection against line transients — the kind of component you bolt between the supply and the drive to keep the drive's DC bus from eating every spike on the line. Rated for 460 V AC, it handles a continuous 19.8 A (22 A maximum) with a 1.6 mH inductance and a 5 % relative inductive voltage drop at rated current. The headline numbers here are the current and inductance. The 19.8 A rated current (22 A max) tells you this choke is sized for a drive drawing roughly that much line current — think a 7.5 to 11 kW motor on a 400 V class drive, depending on drive efficiency and load profile. The 1.6 mH inductance at 5 % voltage drop is a typical value for a 3 % impedance line reactor; it's enough to knock the edge off the drive's input current harmonics to meet basic IEEE 519 limits without over-attenuating the drive's available torque. The IP00 rating means this is an open-frame component — no enclosure. It's meant to live inside a panel, bolted to a mounting plate or DIN rail, with the panel's own IP rating providing the environmental seal. The screw terminals accept standard power wiring; you'll land the line and load conductors directly on the choke's terminals, no special connectors needed. Thermal class B (130 °C rise) with a 40 °C ambient means the choke is rated for a 90 K temperature rise above a 40 °C room — standard for industrial panel gear. This choke mounts between the incoming line power and the VFD's input terminals. In a typical panel layout, it sits after the main disconnect and fusing but before the drive's input — physically close to the drive to keep the un-filtered line from coupling into other circuits. The 0.219 m width and 0.179 m height mean it'll fit on a standard backplate without crowding, but the 0.123 m depth may require a deeper-than-minimum enclosure if you're mounting it flush against a door or another component. Operating frequency range is 0 to 60 Hz, so it works on 50 Hz and 60 Hz line supplies without issue. The 5 % voltage drop at rated current is a design parameter — the drive's DC bus voltage will be about 5 % lower than without the choke, so factor that into your motor torque calculations at the far end of a long cable run.","metaTitle":"Siemens 4EP3905-0BK00 Mains Choke for VFD, 3-Phase 460V 22A","metaDescription":"Siemens 4EP3905-0BK00 mains choke for frequency converters. 3-phase, 460V AC, rated 19.8A (max 22A), 1.6 mH, IP00, screw terminals. Mature lifecycle; sourced to order. Request quot","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":"22A","Rated Value":"19.8A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel f. FU","Protection class IP":"IP00","Inductivity rated value":"0.0016H","Operating voltage rated value":"460V","Ambient temperature rated value":"40°C","Operating frequency rated value":"0 ... 60Hz","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":"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=22737&mlfb=4EP3905-0BK00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3905-0BK00/alternatives.json"},"ai":{"faq":[{"question":"Will 4EP3905-0BK00 fit in a panel designed for a 5SL6606-7YA circuit breaker?","answer":"No. The 5SL6606-7YA is a miniature circuit breaker — a different product class. This choke is a separate component that mounts on the line side of a VFD and would require its own panel space and wiring; it does not drop into the same mounting footprint or electrical position."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3905-0BK00","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/4EP3905-0BK00 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}}