{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU9951-0UA00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU9951-0UA00","canonicalUrl":"https://aoctrl.com/siemens/4EU9951-0UA00","factsUrl":"https://aoctrl.com/api/mcp/products/4EU9951-0UA00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIDAC series, output reactor, 4EU9951-0UA00, single-phase AC, 1080 A, 0–300 Hz, 6 kHz switching frequency, 0.23 mH, IP00, flat-type terminals.","salesMarkdown":"The Siemens SIDAC 4EU9951-0UA00 is a single-phase output reactor rated for 1080 A AC continuous current, designed to sit between a variable-frequency drive and the motor cable. It limits the rate of rise of voltage (dV/dt) and reduces capacitive charging currents in long motor leads, which protects the motor winding insulation and extends bearing life. The reactor is rated for a fundamental frequency range of 0 to 300 Hz and a switching frequency of 6 kHz, covering most PWM drive topologies in industrial use. The 0.23 mH inductance value (with a 6.8 % voltage drop at rated current) determines the dV/dt suppression: higher inductance gives more filtering but also more voltage drop, so the 6.8 % figure is a standard trade-off for motor cable lengths up to about 300 m. Class H insulation (180 °C thermal class per IEC 60085) means the reactor can handle sustained overloads and high ambient temperatures without derating prematurely. This is an open-frame (IP00) component — no enclosure, so it mounts inside a panel or cabinet where the environment is clean and dry. The flat-type terminals accept busbar or large cable lugs; plan for a bolted connection rather than a spring clamp. Physical footprint is 0.37 m wide × 0.32 m deep × 0.24 m high, which fits a standard 800 mm wide cabinet with room for side cable ducts. Single-phase design means one reactor per motor phase; for a three-phase motor you need three units.","metaTitle":"Siemens SIDAC 4EU9951-0UA00 Output Reactor, 1080 A, 300 Hz","metaDescription":"Siemens SIDAC 4EU9951-0UA00 single-phase output reactor, 1080 A AC, 0–300 Hz, 6 kHz switching, 0.23 mH, IP00, class H. Mature lifecycle; sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.32m","Width":"0.37m","Height":"0.24m","Maximum":"300Hz","Minimum":"0Hz","Rated Value":"6 000Hz","Phase Number":"1","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Brand Name":"SIDAC","Product Designation":"output reactor","protection class IP":"IP00","current at AC maximum":"1 080A","Inductivity Rated Value":"0.00023H","Ambient Temperature Rated Value":"40°C","thermal class according to IEC 60085":"H","operational current at AC rated value":"1 080A","Type Of Electrical Connection For Main Current Circuit":"flat connector"}},"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=268259&mlfb=4EU9951-0UA00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU9951-0UA00/alternatives.json"},"ai":{"faq":[{"question":"What are the key electrical ratings for 4EU9951-0UA00?","answer":"Single-phase AC, 1080 A continuous, 0–300 Hz fundamental, 6 kHz switching frequency, 0.23 mH inductance, 6.8 % voltage drop, class H insulation, 40 °C ambient."},{"question":"Where can I buy 4EU9951-0UA00?","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":"What is the physical size of 4EU9951-0UA00?","answer":"Width 0.37 m, depth 0.32 m, height 0.24 m. Open-frame IP00 with flat-type terminals for busbar or lug connection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU9951-0UA00","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/4EU9951-0UA00 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}}