U Cores (9077025002) Part Number: 9077025002 77 U CORE Explanation of Part Numbers: Digits 1&2 = product class, 3&4 = material grade. The U core offers an economical core design with a nearly uniform cross- sectional area. In a power ferrite material they are frequently used in output chokes, power input filters and transformers for switched- mode power supplies and HF fluorescent ballasts. For any U core requirement not listed in the catalog, please contact our customer service group for availability and pricing. Catalog Drawing 3D Model Weight indicated is per pair or set. Weight: 17.5 (g) Dim mm mm tol nominal inch inch misc. A 25.4 0.75 1 B 15.75 +0.25 0.625 C 6.35 0.25 0.25 D 9.4 Min 0.37 Min E 12.45 Min 0.49 Min Chart Legend An I core, 9377024002, is available for these U cores. See I Core Section of our catalog. l/ A : Core Constant, l : Effective Path Length, A : Effective Cross- Sectional Area, V : e e e Effective Core Volume A : Inductance Factor L Electrical Properties A (nH) 790 Min L 2 Ae(cm ) 0.4 -1 l/ A(cm ) 20.7 l (cm) 8.4 e 3 V (cm ) 3.36 e A value is measured at 1kHz, < 10 gauss. L These U cores have the same minimum cross- sectional area as the listed effective cross- sectional area.Fair- Rite Products Corp. One Commercial Row, Wallkill, New York 12589-0288 888-324-7748 845-895-2055 Fax: 845-895-2629 emailprotected www.fair- rite.com