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EFD Cores (8995252521)

Part Number: 8995252521
95 EFD CORE SET
Dimensions
Inductive Components
Closed Magnetic Circuit
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Part Number: 8995252521

95 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.

Catalog Drawing
3D Model

Weight indicated is per pair or set.

Weight: 16 (g)

Dimmmmm tolnominal inchinch misc.
A25± 0.500.984_
B12.5± 0.250.492_
C9.1± 0.300.358_
D9.3± 0.250.366_
E18.7± 0.600.736_
F11.4± 0.200.449_
K5.2± 0.200.205_

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)2650 ±25%
Ae(cm2)0.58
Σl/A(cm-1)10.4
le(cm)5.88
Ve(cm3)3.32
Amin(cm2)0.55

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 800
Coercive Force Oersted Hc 0.13
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 3
0.1
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 0.4
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

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

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