EER Cores (9578424402)
78 EER CORE SET
78 Material
Inductive Components
Closed Magnetic Circuit
Printer Friendly Data Sheet
Check Stock
Part Number: 9578424402
78 EER CORE SET
EER cores, similar to ETD cores, have been designed to make optimum use of a given volume of ferrite material for maximum throughput power. The structure, which includes a round center post, approaches a nearly uniform cross-sectional area throughout the core and provides a winding area that minimizes winding losses.
EER cores can be supplied with the center post gapped to a mechanical dimension or an ALvalue.
Weight indicated is per pair or set.
Weight: 96 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 42 | ± 0.70 | 1.654 | _ |
| B | 22 | ± 0.20 | 0.866 | _ |
| C | 15.2 | ± 0.35 | 0.598 | _ |
| D | 15.4 | ± 0.20 | 0.606 | _ |
| E | 30.5 | min | 1.201 | min |
| F | 15.2 | ± 0.35 | 0.598 | _ |
Chart Legend
Σl/A : Core Constant, le : Effective Path Length, Ae : Effective Cross-Sectional Area, Ve : Effective Core Volume
AL : Inductance Factor 
Explanation of Part Numbers: Digits 1 & 2 = product class and 3 & 4 = material grade.
| Electrical Properties | |
| AL(nH) | 4000 ±25% |
| Ae(cm2) | 1.87 |
| Σl/A(cm-1) | 5.2 |
| le(cm) | 9.79 |
| Ve(cm3) | 18.26 |
| Amin(cm2) | 1.81 |
AL value is measured at 1 kHz, B < 10 gauss.
Ferrite Material Constants
Storage and Operating Temperature
Printer Friendly Data Sheet - Download as pdf file