Deze tabel zal helpen om de juiste ferriet materiaalkeuze te maken. Er is een groot verschil tussen mantelstroom onderdrukking (common mode choke) of breedband transformatoren. In het geval van mantelstroom onderdrukking zal het aantal windingen de frequentie veranderen. Als het aantal windingen toeneemt zal ook de demping toenemen maar de frequentie waarop het filter optimaal is zal juist afnemen.

Ferrite material help
MaterialCommon mode choke frequency range (single turn)Common mode choke frequency range (multiple turns)Impedance transformer1:1 Balun (Choke)
#313,5 - 100 MHz1,5 - 50 MHz-1,5 - 30 MHz
#4325 - 600 MHz2 - 60 MHz2 - 50 MHz2 - 30 MHz
#52150 - 1000 MHz4 - 150 MHz1 - 60 MHz1 - 60 MHz
#61200 - 2000 MHz5 - 200 MHz15 - 200 MHz10 - 100 MHz
#77200 kHz - 10 MHz100 kHz - 10 MHz0,5 - 8 MHz1 - 8 MHz

31 Material

PropertySymbolValueUnit
Initial Permeabilityµi1500
Flux Density @ Field strengthB
H
3900
5
Gauss
Oersted
Residual Flux DensityBr3200Gauss
Coersive forceHc0.28Oersted
Loss Factor @ FrequencyTan δ/ µi
20
1.0
10^-6
MHz
Temperature Coefficient of Initial Permeability (20 -70°C)1.6%/°C
Curie TemperatureTc>130°C
Resistivityρ3000ohm-cm

43 Material

PropertySymbolValueUnit
Initial Permeabilityµi800
Flux Density @ Field strengthB
H
2900
10
Gauss
Oersted
Residual Flux DensityBr1300Gauss
Coersive forceHc0.45Oersted
Loss Factor @ FrequencyTan δ/ µi
250
1.0
10^-6
MHz
Temperature Coefficient of Initial Permeability (20 -70°C)1.25%/°C
Curie TemperatureTc>130°C
Resistivityρ1×10^5ohm-cm

52 Material

PropertySymbolValueUnit
Initial Permeabilityµi250
Flux Density @ Field strengthB
H
4200
10
Gauss
Oersted
Residual Flux DensityBr3300Gauss
Coersive forceHc0.6Oersted
Loss Factor @ FrequencyTan δ/ µi
45
1.0
10^-6
MHz
Temperature Coefficient of Initial Permeability (20 -70°C)0.75%/°C
Curie TemperatureTc>250°C
Resistivityρ1 x 10^9ohm-cm

61 Material

PropertySymbolValueUnit
Initial Permeabilityµi125
Flux Density @ Field strengthB
H
2500
15
Gauss
Oersted
Residual Flux DensityBr1000Gauss
Coersive forceHc1.1Oersted
Loss Factor @ FrequencyTan δ/ µi
30
1.0
10^-6
MHz
Temperature Coefficient of Initial Permeability (20 -70°C)0.1%/°C
Curie TemperatureTc>300°C
Resistivityρ1 x 10^8ohm-cm

77 Material

PropertySymbolValueUnit
Initial Permeabilityµi2000
Flux Density @ Field strengthB
H
5100
5
Gauss
Oersted
Residual Flux DensityBr1800Gauss
Coersive forceHc0.25Oersted
Loss Factor @ FrequencyTan δ/ µi
15
0.1
10^-6
MHz
Temperature Coefficient of Initial Permeability (20 -70°C)1.2%/°C
Curie TemperatureTc>200°C
Resistivityρ100ohm-cm