EFD Cores (8995101021)
98 EFD CORE SET
95 Material
Inductive Components
Closed Magnetic Circuit
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Part Number: 8995101021
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: 0.9 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 10.5 | ± 0.30 | 0.413 | _ |
| B | 5.2 | ± 0.15 | 0.205 | _ |
| C | 2.7 | ± 0.20 | 0.106 | _ |
| D | 3.75 | ± 0.15 | 0.148 | _ |
| E | 7.65 | ± 0.30 | 0.301 | _ |
| F | 4.55 | ± 0.20 | 0.179 | _ |
| K | 1.45 | ± 0.10 | 0.057 | _ |
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) | 610 ±25% |
| Ae(cm2) | 0.072 |
| Σl/A(cm-1) | 32.7 |
| le(cm) | 2.36 |
| Ve(cm3) | 0.171 |
| Amin(cm2) | 0.066 |
AL value is measured at 1 kHz, B < 10 gauss.
A low loss MnZn ferrite material for power applications up to 200 kHz with low temperature variation. New type of 95 material is a low loss power material which features less power loss variation over temperature (25-100°C) at moderate flux densities for operation below 200 kHz.
Available in 95 material:
Pot Cores
RM
PQ
EFD
EP
95 Material Characteristics
| Property | Unit | Symbol | Value |
| Initial Permeability @ B < 10 gauss | µi | 3000 | |
| Flux Density @ Field Strength | Gauss Oersted |
B H |
5000 5 |
| Residual Flux Density | Gauss | Br | 1200 |
| Coercive Force | Oersted | Hc | 0.18 |
| Loss Factor @ Frequency | 10 -6 MHz |
Tan δ/ µi | 2.5 0.1 |
| Temperature Coefficient of Initial Permeability (20 -70°C) | %/°C | 0.6 | |
| Curie Temperature | °C | Tc | >220 |
| Resistivity | Ohm-cm | ρ | 200 |
**** Characteristic curves are measured on standard Toroids (18/10/6 mm) at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.
Material Safety Data Sheet (MSDS)
Click here to download Complex Permeability vs. Frequency (CSV)
Ferrite Material Constants
Storage and Operating Temperature
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