POWDERED IRON MATERIAL RECOMMENDED FOR POWER AND EMI FILTERS

NOMINAL PERMEABILITY

EFFECTIVE PERMEABILITY

RELATIVE Q

RECOMMENDED FREQUENCY RANGE

PERMACOR MATERIAL IDENTIFICATION

BASIC MATERIAL

UNIQUE CHARACTERISTICS

80

6.59

Low

60HZ to 1MHZ

P80

Electrolytic

Highest permeability low Q excellent for swinging inductors EMI/power filters high flux.

75LL

6.33

Medium

60HZ to 1MHZ

P75LL

Blend

High permeability low losses low cost ideal for EMI and RFI high flux material.

75

6.33

Low

60HZ to 1MHZ

P75

Electrolytic

High permeability low Q. Ideal for EMI and RFI high flux material.

60

5.95

Lowest

60HZ to 500KHZ

P60

Reduced Atomized

High permeability lowest cost ideal for switching poer supplies and chokes.

40

5.75

Medium

10KHZ to 1.5MHZ

P40

Electolytic

Medium permeability low lossesminimum saturation high energy storage. High cost.

35

5.65

Medium

20KHZ to 10MHZ

P35

Carbonyl GQ4

Lowest cure losses for over 50 KHZ. Excellent Q up to 5 MHZ. Highest cost power material.

21

5.33

High

50KHZ to 10MHZ

P21

Electrolytic

Low losses frequency stable low T.C. ideal for higher frequency.

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