Magnetic Properties of Ferrite Materials 
 


Property Unit Symbol 43 79 31 77 78 73 75 76
Initial Permeability
@ B <10 gauss
  µi 800 1400 1500 2000 2300 2500 5000 10000
Flux Density
@ Field Strength
Gauss
mT
oersted
A/m
B

H
2900
290
10
800
4700
470
5
400
3400
340
5
400
4900
490
5
400
4800
480
5
400
3900
390
5
400
4300
430
5
400
4000
400
5
400
Residual Flux Density Gauss
mT
Br 1300
130
1700
170
2500
250
1800
180
1500
150
1500
150
1400
140
1800
180
Coercive Force Oersted
A/m
Hc 0.45
36
0.40
32
0.35
25
0.30
24
0.20
16
0.24
19.2
0.16
13
0.12
9.6
Loss Factor
@Frequency
10-6
MHz
tan δµi 250
1.0
4.0
0.1
20
0.1
15
0.1
4.5
0.1
10
0.1
15
0.1
15
0.025
Temperature Coefficient of
Initial Permeability (20-70oC)
%/oC   1.25 0.6 1.6 0.7 1.0 0.65 0.6 0.5
Curie Temperature oC Tc >130 >225 >130 >200 >200 >160 >140 >120
Resistivity Ω cm ρ 1x105 2x102 3x103 1x102 2x102 1x102 3x102 50
Power Loss Density
25kHz - 270 G - 100C
lOOkHz - 1000 G - 100C
5OOkHz - 500 G - 100C
mW
cm3
 
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80

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200
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75
85
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140
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Recommended Frequency Range
Application Areas:
- Low Flux density devices
- EMI Suppression
- Power Magnetics
- Special Square Loop Ferrites

MHz
 


<10
25-300
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<0.75
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1-300
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<3
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<0.1
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<2.5
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<0.5
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<50
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<0.75
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<0.1
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<0.5
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See this page for additional material data     16 18/19 17 20/21 22/23 24 25 26

   




   

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