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

Material	Common mode choke frequency range (single turn)	Common mode choke frequency range (multiple turns)	Impedance transformer	1:1 Balun (Choke)
#31	3,5 - 100 MHz	1,5 - 50 MHz	-	1,5 - 30 MHz
#43	25 - 600 MHz	2 - 60 MHz	2 - 50 MHz	2 - 30 MHz
#52	150 - 1000 MHz	4 - 150 MHz	1 - 60 MHz	1 - 60 MHz
#61	200 - 2000 MHz	5 - 200 MHz	15 - 200 MHz	10 - 100 MHz
#77	200 kHz - 10 MHz	100 kHz - 10 MHz	0,5 - 8 MHz	1 - 8 MHz

31 Material

Property	Symbol	Value	Unit
Initial Permeability	µi	1500
Flux Density @ Field strength	B H	3900 5	Gauss Oersted
Residual Flux Density	Br	3200	Gauss
Coersive force	Hc	0.28	Oersted
Loss Factor @ Frequency	Tan δ/ µi	20 1.0	10^-6 MHz
Temperature Coefficient of Initial Permeability (20 -70°C)		1.6	%/°C
Curie Temperature	Tc	>130	°C
Resistivity	ρ	3000	ohm-cm

43 Material

Property	Symbol	Value	Unit
Initial Permeability	µi	800
Flux Density @ Field strength	B H	2900 10	Gauss Oersted
Residual Flux Density	Br	1300	Gauss
Coersive force	Hc	0.45	Oersted
Loss Factor @ Frequency	Tan δ/ µi	250 1.0	10^-6 MHz
Temperature Coefficient of Initial Permeability (20 -70°C)		1.25	%/°C
Curie Temperature	Tc	>130	°C
Resistivity	ρ	1×10^5	ohm-cm

52 Material

Property	Symbol	Value	Unit
Initial Permeability	µi	250
Flux Density @ Field strength	B H	4200 10	Gauss Oersted
Residual Flux Density	Br	3300	Gauss
Coersive force	Hc	0.6	Oersted
Loss Factor @ Frequency	Tan δ/ µi	45 1.0	10^-6 MHz
Temperature Coefficient of Initial Permeability (20 -70°C)		0.75	%/°C
Curie Temperature	Tc	>250	°C
Resistivity	ρ	1 x 10^9	ohm-cm

61 Material

Property	Symbol	Value	Unit
Initial Permeability	µi	125
Flux Density @ Field strength	B H	2500 15	Gauss Oersted
Residual Flux Density	Br	1000	Gauss
Coersive force	Hc	1.1	Oersted
Loss Factor @ Frequency	Tan δ/ µi	30 1.0	10^-6 MHz
Temperature Coefficient of Initial Permeability (20 -70°C)		0.1	%/°C
Curie Temperature	Tc	>300	°C
Resistivity	ρ	1 x 10^8	ohm-cm

77 Material

Property	Symbol	Value	Unit
Initial Permeability	µi	2000
Flux Density @ Field strength	B H	5100 5	Gauss Oersted
Residual Flux Density	Br	1800	Gauss
Coersive force	Hc	0.25	Oersted
Loss Factor @ Frequency	Tan δ/ µi	15 0.1	10^-6 MHz
Temperature Coefficient of Initial Permeability (20 -70°C)		1.2	%/°C
Curie Temperature	Tc	>200	°C
Resistivity	ρ	100	ohm-cm