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EER Cores (9578283402*)
Part Number: 9578283402
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.
Catalog Drawing
3D Model
Weight indicated is per pair or set.
Weight: 32 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 28.5 | ± 0.60 | 1.122 | _ |
| B | 16.9 | ± 0.20 | 0.665 | _ |
| C | 11.4 | ± 0.30 | 0.449 | _ |
| D | 12.5 | ± 0.20 | 0.492 | _ |
| 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) | 2600 ±25% |
| Ae(cm2) | 0.852 |
| Σl/A(cm-1) | 8.7 |
| le(cm) | 7.44 |
| Ve(cm3) | 6.337 |
| Amin(cm2) | 0.77 |
AL value is measured at 1 kHz, B < 10 gauss.
A MnZn ferrite specifically designed for power applications for frequencies up to 200 kHz and low loss inductive applications to 500 kHz.
Available in 78 material:
RFID Rods
Toroids
Mated Parts
78 Material Characteristics
| Property |
Unit |
Symbol |
Value |
| Initial Permeability @ B < 10 gauss |
|
µi |
2300 |
| Flux Density @ Field Strength |
Gauss
Oersted |
B
H |
4800
5 |
| Residual Flux Density |
Gauss |
Br |
1500 |
| Coercive Force |
Oersted |
Hc |
0.20 |
| Loss Factor @ Frequency |
10 -6
MHz |
Tan δ/ µi |
3
0.1 |
| Temperature Coefficient of Initial Permeability (20 -70°C) |
%/°C |
|
1.0 |
| Curie Temperature |
°C |
Tc |
>200 |
| 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
Specific Heat
0.25 cal/g/°C
Thermal Conductivity
3.5 - 4.5 mW/cm-°C
Coefficient of Linear Expansion
8 - 10x10-6/°C
Tensile Strength
4.9 kgf/mm2
Compressive Strength
42 kgf/mm2
Young's Modulus
15x103 kgf/mm2
Hardness (Knoop)
650
Specific Gravity
≈4.7 g/cm3
The above quoted properties are typical for Fair-Rite MnZn and NiZn ferrites.
Storage and Operating Temperature
Printer Friendly Data Sheet - Download as pdf file
* Non-standard part. May have longer lead time, higher price, and higher minimum order quantity.