31 Material 

A MnZn ferrite designed specifically for EMI suppression applications from as low as 1 MHz up to 500 MHz. This material does not have the dimensional resonance limitations associated with conventional MnZn ferrite materials. Round cable EMI suppression cores, round cable snap-its, flat cable EMI suppression cores, and flat cable snap-its are all available in 31 material.


31 Material Characteristics


Property Unit Symbol Value
Initial Permeability
@ B <10 gauss
  µi 1500
Flux Density
@ Field Strength
Gauss
oersted
B
H
3400
5
Residual Flux Density Gauss Br 2500
Coercive Force Oersted Hc 0.35
Loss Factor
@Frequency
10-5
MHz
tan δµi 20
0.1
Temperature Coefficient of
Initial Permeability (20-70oC)
%/oC   1.6
Curie Temperature oC Tc >130
Resistivity Ω cm ρ 3 x 103





   

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