EER Cores (9578282802)
78 EER CORE SET
78 Material
Inductive Components
Closed Magnetic Circuit
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Part Number: 9578282802
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: 28 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 28.5 | ± 0.60 | 1.122 | _ |
| B | 14 | ± 0.20 | 0.551 | _ |
| C | 11.4 | ± 0.30 | 0.449 | _ |
| D | 9.6 | ± 0.20 | 0.378 | _ |
| E | 21.2 | min | 0.835 | min |
| F | 9.9 | ± 0.30 | 0.39 | _ |
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) | 2800 ±25% |
| Ae(cm2) | 0.859 |
| Σl/A(cm-1) | 7.3 |
| le(cm) | 6.29 |
| Ve(cm3) | 5.398 |
| Amin(cm2) | 0.77 |
AL value is measured at 1 kHz, B < 10 gauss.
Ferrite Material Constants
Storage and Operating Temperature
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