ETD Cores (9598394002)Part Number: 9598394002
98 ETD CORE SET
ETD cores have been designed to make optimum use of a given volume of ferrite material for maximum throughput power, specifically for forward converter transformers. 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. ETD cores are used mainly in switched-mode power supplies and permit off-line designs where IEC and VDE isolation requirements must be met.
ETD cores can be supplied with the center post gapped to a mechanical dimension or an ALvalue.
Weight indicated is per pair or set.
Weight: 60 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 39.1 | ± 0.70 | 1.539 | _ |
| B | 19.8 | ± 0.20 | 0.78 | _ |
| C | 12.7 | ± 0.35 | 0.5 | _ |
| D | 14.6 | ± 0.20 | 0.575 | _ |
| E | 29.3 | min | 1.154 | min |
| F | 12.7 | ± 0.35 | 0.5 | _ |
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) | 3000 ±25% |
| Ae(cm2) | 1.28 |
| Σl/A(cm-1) | 7.2 |
| le(cm) | 9.24 |
| Ve(cm3) | 11.85 |
| Amin(cm2) | 1.267 |
AL value is measured at 1 kHz, B < 10 gauss