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.
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.
Σl/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 |
Ae(cm2) | 0.4 |
Σl/A(cm-1) | 20.7 |
le(cm) | 8.4 |
Ve(cm3) | 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.