{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3951-3UB00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3951-3UB00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3951-3UB00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3951-3UB00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 4EU3951-3UB00-0A mains choke for frequency converters, 3-phase, 500V AC, 50Hz, 560A max / 504A rated, 65µH, 4% voltage drop, IP00, flat-type terminals, Class H insulation.","salesMarkdown":"The Siemens 4EU3951-3UB00-0A is a three-phase mains choke (Netzdrossel f. FU) designed for the input side of a frequency converter. It smooths line current, reduces harmonic distortion, and limits inrush current peaks that would otherwise stress the drive's DC bus capacitors. Rated for 504 A continuous with a 560 A maximum, it handles the full-load current of a large drive without saturating. The 500 V AC operating voltage and 50 Hz line frequency match standard European industrial mains. The 65 µH inductance and 4 % relative inductive voltage drop are the key sizing parameters — they determine how much line impedance the choke adds, which governs the harmonic attenuation and the voltage sag the drive sees under load. ## Thermal and construction details Total power loss is 730 W — 540 W in the coil and 190 W in the iron core — all dissipated as heat. Class H insulation (180 °C thermal class per IEC 60085) means the winding can run hot without degrading; still, the panel builder needs to account for that heat load in the enclosure ventilation. IP00 protection class means it is an open-frame component — no housing, no splash protection. Main circuit connections are flat-type terminals (bus-bar style), not screw clamps. That means the installer needs a bus-bar or a flat-cable lug kit — standard ring terminals won't fit. Because it is a mature, high-current line reactor with UL/CSA recognition per EN 61558-2-20, it is still widely specified for drive panels that need a listed input choke. ## Physical footprint Dimensions are 0.229 m deep, 0.41 m wide, and 0.385 m tall — roughly 9 by 16 by 15 inches. That is a substantial block; verify the cabinet depth and backplate space before committing the panel layout.","metaTitle":"Siemens 4EU3951-3UB00-0A Mains Choke, 560A, 500V AC, 50Hz","metaDescription":"Siemens 4EU3951-3UB00-0A mains choke for frequency converters. 560A max, 504A rated, 500V AC, 50Hz, 65µH, IP00, UL/CSA recognized. Mature lifecycle, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.229m","Width":"0.41m","Height":"0.385m","Maximum":"560A","Rated Value":"504A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel f. FU","Protection class IP":"IP00","Inductivity rated value":"0.000065H","Power loss [W] of the coil":"540W","Operating voltage rated value":"500V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"190W","Thermal class acc. to IEC 60085":"H","Type of electrical connection for main current circuit":"flat connector","Relative inductive drop in voltage on the measurement level current, voltage and frequency":"4%"}},"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=473113&mlfb=4EU3951-3UB00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3951-3UB00-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key electrical ratings for 4EU3951-3UB00-0A?","answer":"560 A maximum, 504 A rated continuous, 500 V AC, 50 Hz, 65 µH inductance, 4 % voltage drop. Total power loss is 730 W. Class H insulation (180 °C)."},{"question":"What approvals does 4EU3951-3UB00-0A carry?","answer":"UL/CSA recognized per EN 61558-2-20, the standard for chokes and reactors. No RoHS or REACH date is listed in the available documentation."},{"question":"Where can I buy 4EU3951-3UB00-0A and what is the lead time?","answer":"We source this part through independent distribution and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."},{"question":"Will 4EU3951-3UB00-0A drop into a panel specified for 3RV6011-0CA10?","answer":"No — those are completely different component classes. 3RV6011-0CA10 is a SIRIUS motor-protective circuit breaker (0.25 A, DIN-rail mount, 45 mm wide). 4EU3951-3UB00-0A is a 500 A mains choke with flat-type terminals, 410 mm wide, open-frame. No physical or electrical compatibility."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3951-3UB00-0A","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/4EU3951-3UB00-0A 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}}