{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3900-5MS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3900-5MS00","canonicalUrl":"https://aoctrl.com/siemens/4EP3900-5MS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3900-5MS00","rawCanonicalId":null},"summary":{"shortDescription":"SIDAC, filter reactor, 4EP3900-5MS00, 3-phase, 400V AC, 15.8A rated, 5.67% throttling factor, 10 kvar, IP00.","salesMarkdown":"## What this reactor does on the line The SIDAC 4EP3900-5MS00 is a 3-phase filter reactor rated for 400 V AC at 50 Hz, carrying a continuous rated current of 15.8 A with a maximum of 17.5 A. Its 5.67% relative throttling factor and 0.0031 H inductance are sized to attenuate harmonic currents from VFDs or UPS systems, protecting upstream transformers and switchgear from excessive THD. The 10 kvar reactive power rating gives the panel designer a hard number for capacitor bank coordination. Thermal class B (130 °C rise) per IEC 60085 means it handles the 64 W power loss without forced cooling in a standard IP00 enclosure — mount it in a ventilated cabinet section, not sealed. ## Fit and mounting — what the IP00 and terminals tell you IP00 means no built-in enclosure protection — this reactor is a chassis-mount component for a panel interior, not a standalone box. Dimensions are 0.219 m wide by 0.179 m tall by 0.123 m deep, so it occupies roughly a 220 mm × 180 mm footprint on the backplate. ## What the resonant frequency means for your drive system The filter's resonant frequency is 210 Hz, which is above the 5th harmonic (250 Hz on a 50 Hz fundamental) and below the 7th. This placement means the reactor presents high impedance to dominant harmonics from a 6-pulse rectifier while avoiding series resonance with typical line-side capacitors. If your drive manufacturer specifies a 3% or 5% impedance reactor, the 5.67% figure here is a slightly higher impedance — verify drive compatibility, especially for DC bus voltage drop under load.","metaTitle":"SIDAC 4EP3900-5MS00 Filter Reactor, 3-Phase 400V 15.8A 5.67%","metaDescription":"SIDAC 4EP3900-5MS00 3-phase filter reactor, 400V AC, 15.8A rated, 5.67% throttling factor, 10 kvar. IP00, screw/tab 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":"17.5A","Rated Value":"15.8A","Phase number":"3","Power loss [W]":"64W","Type of voltage":"AC","lifecycle_stage":"mature","Product brand name":"SIDAC","Product designation":"filter reactor","Protection class IP":"IP00","Inductivity rated value":"0.0031H","Relative throttling factor":"5.67%","Operating voltage rated value":"400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Thermal class acc. to IEC 60085":"B","Resonant frequency of the filter":"210Hz","Reactive power of the filter bank rated value":"10 000var","Type of electrical connection for main current circuit":"screw-type terminals / tab terminals"}},"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=499650&mlfb=4EP3900-5MS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3900-5MS00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 4EP3900-5MS00 and get current pricing?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What are the key specifications of the 4EP3900-5MS00?","answer":"It is a 3-phase filter reactor rated 400 V AC, 50 Hz, 15.8 A continuous (17.5 A max), with 5.67% throttling factor, 0.0031 H inductance, 10 kvar reactive power, and 64 W power loss. Thermal class B, IP00, screw/tab terminals."},{"question":"Will the 4EP3900-5MS00 drop into a panel specified around a 5SJ3140-7?","answer":"No — the 5SJ3140-7 is a 1-pole miniature circuit breaker, not a line reactor. They serve different functions in the circuit. The 4EP3900-5MS00 requires separate mounting and wiring for harmonic mitigation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3900-5MS00","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/4EP3900-5MS00 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}}