{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3900-0NK00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3900-0NK00","canonicalUrl":"https://aoctrl.com/siemens/4EP3900-0NK00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3900-0NK00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIDAC output reactor, 3-phase, 50A max, 0.55mH, 480V, IP00, screw terminals.","salesMarkdown":"Its 0.55 mH inductance limits the rate of current rise from a variable-frequency drive's PWM output, protecting the motor windings and extending cable runs. The reactor is designed for a rated switching frequency of 2 kHz and a line frequency of 50/87 Hz, with a short-circuit voltage of 5.4%. The 50 A maximum current is the thermal limit under rated conditions; the continuous current rating (Ith) at 40 °C ambient is 45 A per the detailed spec line. The 0.55 mH inductance and 5.4% impedance (Uk) define the voltage drop at rated current. For a 480 V drive output, expect roughly 26 V drop across the reactor at 45 A — factor that into the motor terminal voltage if the run is marginal. Total power loss is 115 W (75 W coil + 40 W iron core). That heat must be shed into the enclosure; the IP00 open-frame construction means no fan or ducting inside the reactor itself, so panel ventilation or forced airflow is your responsibility. Thermal class B insulation (130 °C rise) at 40 °C ambient gives a 90 K allowable temperature rise. That's standard for industrial motor-circuit reactors and matches most VFD output derating curves. Mounts as a free-standing component inside the enclosure — no DIN-rail footprint. Dimensions are 0.21 m wide × 0.17 m tall × 0.12 m deep, so it needs about 4 liters of panel volume plus clearance for airflow.","metaTitle":"Siemens SIDAC 4EP3900-0NK00 Output Reactor, 50A, 0.55mH, 3-P","metaDescription":"Siemens SIDAC 4EP3900-0NK00 output reactor, 50A max, 0.55mH, 3-phase AC, 480V, 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":"0.21m","Height":"0.17m","Maximum":"50A","Minimum":"0Hz","Rated Value":"2 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":"0.00055H","Power loss [W] of the coil":"75W","Ambient temperature rated value":"40°C","Power loss [W] of the iron core":"40W","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=194952&mlfb=4EP3900-0NK00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3900-0NK00/alternatives.json"},"ai":{"faq":[{"question":"What are the key specifications of 4EP3900-0NK00?","answer":"It is a 3-phase AC output reactor rated for 50 A maximum, 0.55 mH inductance, 480 V, with a switching frequency of 2 kHz and total power loss of 115 W. It uses screw terminals and has an IP00 protection class."},{"question":"Where can I buy 4EP3900-0NK00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 4EP3900-0NK00 fit in my existing panel?","answer":"The reactor measures 0.21 m wide × 0.17 m tall × 0.12 m deep. It is an IP00 open-frame component, so it needs free panel space with adequate ventilation — it does not mount on a DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3900-0NK00","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/4EP3900-0NK00 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}}