{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU3951-0UB00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU3951-0UB00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU3951-0UB00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU3951-0UB00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON / SIRIUS Netzdrossel f. FU, 4EU3951-0UB00-0A, 3-phase AC mains choke, rated 450 A, 690 V, 50 Hz, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU3951-0UB00-0A is a three-phase mains choke (Netzdrossel f. FU) designed for the input side of variable frequency drives. It sits between the supply and the drive's rectifier, limiting current harmonics and reducing voltage notching. A 4% impedance is a common choice for general-purpose drive input filtering — enough to meet IEEE 519-2014 harmonic limits for most six-pulse drives without oversizing the DC bus. Rated 450 A at 690 V AC, 50 Hz, with a 500 A maximum — this choke is sized for a drive with a nominal input current around 450 A. The 0.101 mH inductance (0.0001 H) is the value that, combined with the 4% drop, gives the harmonic attenuation curve. Power loss splits into 540 W in the copper coil and 198 W in the iron core, totalling 738 W at rated load. That heat must be removed from the enclosure — the IP00 rating means no integral enclosure, so the choke is intended for mounting inside a ventilated cabinet. Ambient temperature rated at 40 °C; above that, derate the current per the manufacturer's thermal curve. The flat-type terminals accept busbar or cable lugs — common for high-current connections in drive panels. ## Deployment context This choke is a panel-mount component — no DIN-rail clip, no IP-rated housing. It bolts into a drive cabinet via its chassis, and the flat terminals connect to the incoming supply busbars and the drive input. The 0.41 m width, 0.385 m height, and 0.229 m depth mean it needs a clear footprint inside the enclosure, with adequate ventilation around the core and coil for the 738 W total heat dissipation.","metaTitle":"Siemens 4EU3951-0UB00-0A Line Reactor, 450 A, 690 V, 3-Phase","metaDescription":"Siemens 4EU3951-0UB00-0A mains choke for variable frequency drives. 3-phase, 450 A rated, 690 V, 50 Hz, IP00. Mature lifecycle, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.229m","Width":"0.41m","Height":"0.385m","Maximum":"500A","Rated Value":"450A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Netzdrossel f. FU","Protection class IP":"IP00","Inductivity rated value":"0.0001H","Power loss [W] of the coil":"540W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"198W","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=360291&mlfb=4EU3951-0UB00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU3951-0UB00-0A/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 4EU3951-0UB00-0A and how is it quoted?","answer":"This part is 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 are the key ratings of 4EU3951-0UB00-0A?","answer":"Rated 450 A continuous, 500 A maximum, 690 V AC, 50 Hz, three-phase. Inductance 0.101 mH, 4% relative inductive voltage drop. Total power loss 738 W (540 W coil + 198 W iron core). Thermal class H, IP00, flat-type terminals."},{"question":"What compliance documentation does this brand provide for 4EU3951-0UB00-0A?","answer":"The choke is recognized under UL/CSA (stated in the description as >UL/CSA-RECOGNIZED<) and complies with EN 61558-2-20. RoHS and REACH documentation is typically available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU3951-0UB00-0A","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/4EU3951-0UB00-0A 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}}