EFD Cores (8998303021*)Part Number: 8998303021
98 EFD CORE SET
EFD (Economical Flat Design) cores have been designed to maximize volume in a low profile geometry. EFD cores allow maximum throughput power density with reasonably low mass for board level installation.
EFD cores can be supplied with the center post gapped to a mechanical dimension or an ALvalue.
Weight indicated is per pair or set.
Weight: 24 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 30 | ± 0.80 | 1.181 | _ |
| B | 15 | ± 0.25 | 0.591 | _ |
| C | 9.1 | ± 0.30 | 0.358 | _ |
| D | 11.2 | ± 0.30 | 0.441 | _ |
| E | 22.4 | ± 0.75 | 0.882 | _ |
| F | 14.6 | ± 0.30 | 0.575 | _ |
| K | 4.9 | ± 0.20 | 0.193 | _ |
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) | 2150 ±25% |
| Ae(cm2) | 0.69 |
| Σl/A(cm-1) | 11.3 |
| le(cm) | 6.93 |
| Ve(cm3) | 4.26 |
| Amin(cm2) | 0.66 |
AL value is measured at 1 kHz, B < 10 gauss.