Iron Powder Material Properties

Listed in descending order of permeability

Properties Material
522 262 3 15 1 2 7 6 10 12 17 0
Colour Code grn/blu yel/wht gry/clr red/wht blu/clr red/clr wht/clr yel/clr blk/clr grn/wht blu/yel tan/tan
Permeability (µi) 75 75 35 25 20 10 9.0 8.5 6.0 4.0 4.0 1
Temp. Coeff. 1(+ppm/C) 650 825 370 190 280 95 30 35 150 1703 50 0
Range for Best Q (MHz) n/a n/a 0.02 - 1.0 0.15 - 3.0 0.5 - 5.0 2.0 - 30 1.0 - 25 3.0 - 40 15 - 100 30 - 250 20 - 200 50 - 350
Wideband Range (MHz) n/a n/a 50 - 500 50 - 500 50 - 500 150 - 300 200 - 400 200 - 400 300 - 600 n/a 400 - 700 600 - 1000
  1. value averaged from -55 to +125°C.
  2. mainly used for dc chokes, differential-mode chokes, power factor correction inductors, continuous-mode flyback inductors, light dimmer chokes and other EMI/RFI applications. For frequencies above 250kHz 52 material is a better choice if available.
  3. non-linear. #17 has stable temp coeff., but provides about 10% lower Q than #12.

23/04/07
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