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 A 25.4 0.75 B 15.75 +0.25 C 6.35 0.25 D 9.4 Min E 12.45 Min nominal inch 1 0.625 0.25 0.37 0.49 inch misc. _ _ _ Min Min Chart Legend *An I core, 9377024002, is available for these U cores. See I Core Section of our catalog. l/ A : Core Constant, le: Effective Path Length, Ae: Effective Cross- Sectional Area, Ve: Effective Core Volume AL: Inductance Factor Electrical Properties AL(nH) 790 Min 2 Ae(cm ) 0.4 -1 l/ A(cm ) 20.7 le(cm) 8.4 3 Ve(cm ) 3.36 AL value is measured at 1kHz, < 10 gauss. 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 * ferrites@fair- rite.com * www.fair- rite.com