{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3900-0AS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3900-0AS00","canonicalUrl":"https://aoctrl.com/siemens/4EP3900-0AS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3900-0AS00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIDAC series, output reactor, 4EP3900-0AS00, 3-phase AC, 22A maximum current, 8 kHz rated switching frequency, 0.3 mH inductance, IP00, screw-type terminals.","salesMarkdown":"## What this output reactor does for a VFD line The Siemens SIDAC 4EP3900-0AS00 is a 3-phase output reactor rated for a maximum continuous current of 22A at a switching frequency of 8 kHz, with an inductance of 0.3 mH per phase. It sits between the variable-frequency drive output and the motor leads, smoothing the PWM waveform and limiting the rate of voltage rise (dV/dt) that can stress motor insulation or cause bearing currents. The 22A rating means it handles motor loads drawing up to that current in continuous duty — sized for a typical 7.5 kW to 11 kW induction motor on a 400 VAC line, depending on the drive's switching pattern and cable length. ## Mounting and integration — IP00, screw terminals, panel fit The screw-type terminals accept field wiring for the main circuit, so no special crimp tooling is needed. Dimensions are 0.21 m wide by 0.17 m tall by 0.12 m deep, which fits a standard sub-panel footprint; plan for a 210 mm width on the mounting plate and allow clearance around the terminals for screwdriver access and cable bending radius. ## Thermal design and duty cycle Total power loss splits between the coil (70 W) and the iron core (11.7 W), summing to roughly 82 W of heat that must be dissipated inside the panel. The reactor is rated for a 40 °C ambient temperature with Class B insulation (130 °C hot-spot limit per IEC 60085). In a sealed cabinet, factor that 82 W into the thermal budget — forced airflow or a larger enclosure may be needed if the panel already runs near its dissipation limit.","metaTitle":"Siemens SIDAC 4EP3900-0AS00 Output Reactor, 22A 3-Phase AC","metaDescription":"Siemens SIDAC 4EP3900-0AS00 3-phase output reactor, 22A max, 8 kHz switching frequency, 0.3 mH, IP00, screw terminals. Mature lifecycle, quoted to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.12m","Width":"0.21m","Height":"0.17m","Maximum":"22A","Minimum":"0Hz","Rated Value":"8 000Hz","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product brand name":"SIDAC","Product designation":"output reactor","Protection class IP":"IP00","Inductivity rated value":"0.0003H","Power loss [W] of the coil":"70W","Ambient temperature rated value":"40°C","Power loss [W] of the iron core":"11.7W","Thermal class acc. to IEC 60085":"B","Type of electrical connection for main current circuit":"screw-type 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=525988&mlfb=4EP3900-0AS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3900-0AS00/alternatives.json"},"ai":{"faq":[{"question":"What is the 4EP3900-0AS00 used for?","answer":"It is a 3-phase output reactor (also called an output choke) placed between a variable-frequency drive and the motor to protect the motor insulation from PWM voltage spikes and to reduce common-mode currents. It is rated for 22 A continuous at an 8 kHz switching frequency with 0.3 mH inductance."},{"question":"Where can I buy the 4EP3900-0AS00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and target delivery window."},{"question":"What compliance documentation does Siemens provide for the 4EP3900-0AS00?","answer":"The reactor is designed to EN 61558-2-20 (safety of transformers, reactors, power supply units). Standard Siemens documentation includes the CE declaration of conformity; RoHS and REACH compliance data is available on request through the RFQ process."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3900-0AS00","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/4EP3900-0AS00 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}}