{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3951-0UA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3951-0UA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3951-0UA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3951-0UA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU3951-0UA00-0A mains choke for frequency converters, 3-phase, 690V AC, 910A max current, 50 Hz, 27 µH inductance, IP00 open-frame, flat-type terminals.","salesMarkdown":"The Siemens 4EU3951-0UA00-0A is a three-phase mains choke (line reactor) designed for installation ahead of a frequency converter (variable-frequency drive). It smooths the input current, reduces harmonic distortion, and limits inrush current spikes that would otherwise stress the drive's DC bus capacitors and upstream protection. Inductance is 27 µH (0.0279 mH), sized for the drive's line-side filtering. Total power loss splits between 384 W in the coil and 190 W in the iron core, which must be ventilated — the IP00 open-frame construction means no enclosure, so the choke relies on the panel's airflow to stay within the 40 °C ambient rating. Physical footprint: 0.41 m wide × 0.385 m tall × 0.229 m deep. This is a substantial component — plan for a dedicated mounting plate or chassis rail in the enclosure; it will not fit a standard DIN rail. Thermal class H insulation (IEC 60085) means the winding can handle a 180 °C hot-spot temperature. In a 40 °C ambient, the 574 W total loss (coil + iron) must be removed by forced or natural convection — do not box it in without calculating the temperature rise. The IP00 rating means it is not protected against dust ingress or accidental contact; install it in a locked or guarded cabinet.","metaTitle":"Siemens 4EU3951-0UA00-0A Mains Choke, 910A, 690V, IP00","metaDescription":"Siemens 4EU3951-0UA00-0A mains choke for frequency converters. 3-phase, 690V AC, 910A max, 819A rated, 50 Hz, 27 µH, IP00. Mature lifecycle, sourced to order. Request quote.","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","Phase Number":"3","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Designation":"Netzdrossel f. FU","protection class IP":"IP00","current at AC maximum":"910A","Inductivity Rated Value":"2.7E-5H","power loss [W] of the coil":"384W","Operating Voltage Rated Value":"690V","Ambient Temperature Rated Value":"40°C","Operating Frequency Rated Value":"50Hz","power loss [W] of the iron core":"190W","thermal class according to IEC 60085":"H","operational current at AC rated value":"819A","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=215971&mlfb=4EU3951-0UA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3951-0UA00-0A/alternatives.json"},"ai":{"faq":[{"question":"Will 4EU3951-0UA00-0A drop into a panel specified around 5SJ3140-7?","answer":"No. The 5SJ3140-7 is a 1-pole 40 A miniature circuit breaker (240 V AC, DIN-rail mount, IP20). The 4EU3951-0UA00-0A is a 3-phase 910 A mains choke (690 V, IP00, flat-terminal, chassis-mount). They share no mounting, wiring, or functional compatibility — the choke is a line-reactor, not a breaker."},{"question":"What are the key dimensions of 4EU3951-0UA00-0A?","answer":"Width 0.41 m, height 0.385 m, depth 0.229 m. These are the external envelope dimensions; allow extra clearance for ventilation and cable bending radius around the flat-type terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3951-0UA00-0A","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/4EU3951-0UA00-0A 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}}