Part Number: 6578100121
78 EP CORE SET
EP designs reduce the effect of residual air gap upon the effective permeability of the core, hence they minimize coil volume for a given inductance. EP cores also provide a high degree of isolation from adjacent components and are advantageously used in low power devices, matching and broadband transformers.
EP cores can be supplied with the center post gapped to a mechanical dimension or an ALvalue.
Weight indicates is per pair or set.
Weight: 1.4 (g)
Chart Legend
•Dimensions (Top numbers are in millimeters, bottom numbers are in nominal inches.).
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 11.5 | ± 0.30 | 0.453 | _ |
| B | 5.1 | ± 0.20 | 0.201 | _ |
| C | 7.7 | ± 0.20 | 0.303 | _ |
| D | 3.8 | ± 0.20 | 0.15 | _ |
| E | 9.4 | ± 0.20 | 0.37 | _ |
| F | 3.3 | ± 0.20 | 0.13 | _ |
| K | 1.95 | min | 0.076 | min |
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) | 1000 ±25% |
| Ae(cm²) | 0.11 |
| Σl/A(cm⁻¹) | 16.8 |
| le(cm) | 1.85 |
| Ve(cm³) | 0.203 |
| Amin(cm²) | 0.085 |
AL value is measured at 1 kHz, B < 10 gauss