{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP4000-8US00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP4000-8US00","canonicalUrl":"https://aoctrl.com/siemens/4EP4000-8US00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP4000-8US00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP4000-8US00 mains choke for frequency converters, 3-phase, 500V AC, 112A max, 0.16mH, 2% voltage drop, IP00, flat-type terminals.","salesMarkdown":"## Line reactor for VFD input — what the ratings mean The Siemens 4EP4000-8US00 is a three-phase mains choke (Netzdrossel f. FU) designed to sit between the supply and a variable-frequency drive. Its job is to smooth current harmonics, limit inrush, and protect the drive's DC bus from line transients. The 112 A maximum current and 100.8 A rated operational current at 500 V AC, 50 Hz tell you this reactor is sized for a drive in the 55–75 kW range depending on load profile — think a 75 kW pump or a 55 kW conveyor with heavy starting duty. The 0.16 mH inductance with a 2% relative voltage drop at rated current is a standard impedance match for most general-purpose VFDs; it keeps the voltage sag low enough that the drive still sees full bus voltage under load. The IP00 rating means this is an open-frame component — no enclosure, no drip shield. It belongs inside a panel, bolted to a mounting plate with adequate clearance for airflow. The 78 W coil loss plus 21.5 W iron loss totals about 100 W of heat to vent; that's not trivial in a sealed cabinet. Plan for forced ventilation or a larger enclosure than the drive alone would need. The Class B insulation (130 °C rise) is the standard thermal class for industrial reactors — it handles the heat without derating up to the 40 °C ambient the rating is based on. ## Termination and mounting Terminals are flat-type connectors — bus-bar style, not ring lugs or spring cages. That means you'll need a flat copper bar or a crimp-on flat terminal to match. The footprint is 0.219 m wide by 0.179 m tall by 0.143 m deep; it's a substantial block, roughly the size of a shoebox on its side. Mounting is via the core's through-holes — no DIN rail clip, so plan for a drilled backplate or a mounting bracket in the panel layout.","metaTitle":"Siemens 4EP4000-8US00 Line Reactor, 112A, 500V, 0.16mH","metaDescription":"Siemens 4EP4000-8US00 3-phase mains choke for VFDs. 112A max, 500V, 0.16mH, 2% voltage drop. IP00 open-frame, flat terminals. UL/CSA recognized. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.143m","Width":"0.219m","Height":"0.179m","Phase Number":"3","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Designation":"Netzdrossel f. FU","protection class IP":"IP00","current at AC maximum":"112A","Inductivity Rated Value":"0.00016H","power loss [W] of the coil":"78W","Operating Voltage Rated Value":"500V","Ambient Temperature Rated Value":"40°C","Operating Frequency Rated Value":"50Hz","power loss [W] of the iron core":"21.5W","thermal class acc. to IEC 60085":"B","operational current at AC rated value":"100.8A","Type Of Electrical Connection For Main Current Circuit":"flat connector","Relative Inductive Drop In Voltage For Rated Value Of The 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=7894&mlfb=4EP4000-8US00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP4000-8US00/alternatives.json"},"ai":{"faq":[{"question":"What are the key electrical ratings of 4EP4000-8US00?","answer":"Three-phase, 500 V AC, 50 Hz, 112 A maximum current, 100.8 A rated operational current, 0.16 mH inductance, 2% voltage drop at rated current. Coil loss is 78 W, iron loss 21.5 W, Class B insulation, 40 °C ambient rating."},{"question":"Where can I buy 4EP4000-8US00 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What compliance documentation does 4EP4000-8US00 carry?","answer":"UL/CSA recognized per EN 61558-2-20. The IP00 open-frame design and Class B insulation per IEC 60085 are on the spec sheet."},{"question":"Will 4EP4000-8US00 drop into a panel specified around 5SJ3140-7?","answer":"No — 5SJ3140-7 is a 1-pole 40 A miniature circuit breaker, a completely different component class. The 4EP4000-8US00 is a 3-phase line reactor with flat-type terminals, not a DIN-rail breaker. The panel would need a separate mounting plate and bus-bar connections."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP4000-8US00","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/4EP4000-8US00 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}}