General Material Properties

Material Mix No. Reference Permeability Powder Type Temp Coef of Perm (+ppm/C°) Density gm/cm3 Max Frequency (MHz) Relative Cost Color Code Toroid   Product Group
RF PC 200C
-60 55 Silicon-Iron 168 6.1 1.3 2.0 Brown/Black      
-61 38 Silicon-Iron -418 6.1 2.0 2.0 Brown/Gray      
-63 35 Silicon-Iron -313 5.9 5.8 3.0 Brown/Beige      
-65 42 Silicon-Iron -80 6.1 2.0 2.0 Brown/Yellow      
-66 66 Silicon-Iron -220 6.2 1.5 2.5 Brown/Brown      
-70 100 Nickel-Iron 216 7.4 0.66 9.9 Beige/Black      
-M125 125 Molypermalloy 150 7.7 0.48 12.0 Lt.Blue/Lt.Blue      

Material Magnetic Characteristics

Material Mix No. Bsat (G) H (Oe) at 80% µi %µi at H=50 (Oe) µ effective at H=50 (Oe) Core Loss (mW/cm3)
60 Hz / 5000 G 10 kHz / 500 G 100 kHz / 140 G 1 MHz / 40G 10 MHz / 15 G
-60 14,400 35 71 39 43 76 52 68 630
-61 14,400 65 85 32 80 113 69 72 569
-63 14,100 69 86 30 74 60 31 20 88
-65 16,000 55 82 35 54 77 33 48 567
-66 16,200 36 71 47 48 48 17 31 392
-70 8,600 20 47 47 6 10 13 69 947
-M125 8,800 24 44 55 5 6 13 86 1193

Material Information

‐60 Material: The 60 Series of materials are cost effective magnetic powder alloy materials that are not subject to thermal aging for operating temperatures up to 200°C. The ‐60 Material has 55 permeability and can be considered as a substitute for ‐18 Material.

‐61 Material, ‐63 Materials: Both materials have initial permeability of 35. The ‐63 Material has excellent high frequency properties and be and can operate past 10MHz. ‐63 Material can be considered for high temperature alternate to ‐8 Material. Both materials are not subject to thermal aging concerns.

‐66 Material: This material offers low core losses and is well suited from 100kHz to 500kHz. No thermal aging concerns.

‐70 Material: This is a magnetic powder alloy including nickel. The ‐70 Material has higher permeability than the 60 Series with excellent losses up to 400kHz. This is a relatively expensive material, most competitively priced in smaller sizes. No thermal aging concerns.

‐M125 Material: This is a molypermally powder material and will have the highest permeability and lowest losses below 200kHz. Similar to the ‐70 Material is cost, the ‐M125 Material will be most competitively priced in smaller sizes.

Initial Permeability (µi) vs. DC Magnetizing Force

Percent Initial Permeability (%µi) vs. DC Magnetizing Force

Percent Initial Permeability (%µi) vs. Peak AC Flux Density

Initial Permeability (µi) vs Frequency (Hz)

BH Curves

Material Frequency Range