Iron Powder Material |
Basic Iron Powder |
Material Permeability µ_{o} |
Temperature Stability (ppm/°C) |
Resonant Circuit Frequency Range (MHz) |
Color Code |
0 |
Phenolic |
1 |
0 |
100.0 - 300.0 |
Tan |
1 |
Carbonyl C |
20 |
280 |
0.5 - 5.0 |
Blue |
2 |
Carbonyl E |
10 |
95 |
2.0 - 30.0 |
Red |
3 |
Carbonyl HP |
35 |
370 |
0.05 - 0.5 |
Grey |
6 |
Carbonyl SF |
8 |
35 |
10.0 - 50.0 |
Yellow |
7 |
Carbonyl TH |
9 |
30 |
5.0 - 35.0 |
White |
10 |
Carbonyl W |
6 |
150 |
30.0 - 100.0 |
Black |
12 |
Synthetic Oxide |
4 |
170* |
50.0 - 200.0 |
Green/White |
15 |
Carbonyl GS6 |
25 |
190 |
0.10 - 2.0 |
Red/White |
17 |
Carbonyl |
4 |
50 |
50.00 - 200.0 |
Blue/Yellow |
26 |
Special |
75 |
882 |
LF filters, chokes |
Yellow/White |
Material #17 has been
developed as a temperature stable alternative to the #12.
Frequency ranges shown are for best 'Q'/ Useful over broader
frequency ranges with lower 'Q'.
MATERIAL 0 -- Permeability 1, Freq Range 100 MHz
- 300 MHz, Color - Tan
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-0 | .125 | .062 | .050 | .74 | .010 | .007 | 3.0 |
T-16-0 | .160 | .078 | .060 | .95 | .016 | .015 | 3.0 |
T-20-0 | .200 | .088 | .070 | 1.15 | .025 | .029 | 3.5 |
T-25-0 | .255 | .120 | .096 | 1.50 | .042 | .063 | 4.5 |
T-30-0 | .307 | .151 | .128 | 1.83 | .065 | .119 | 6.0 |
T-37-0 | .375 | .205 | .128 | 2.32 | .070 | .162 | 4.9 |
T-44-0 | .440 | .229 | .159 | 2.67 | .107 | .286 | 6.5 |
T-50-0 | .500 | .303 | .190 | 3.03 | .121 | .367 | 6.4 |
T-68-0 | .690 | .370 | .190 | 4.24 | .196 | .831 | 7.5 |
T-80-0 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 8.5 |
T-94-0 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 10.6 |
T-106-0 | 1.060 | .570 | .437 | 6.50 | .690 | 4.485 | 19.0 |
T-130-0 | 1.300 | .780 | .437 | 8.29 | .730 | 6.052 | 15.0 |
Note:
Due to the nature of the '0' material, the inductance resulting from the use of the given A_{L} value may vary greatly depending upon the winding technique. This may cause discrepancy between calculated and measured inductance.
MATERIAL 1 -- Permeability 20, Freq. Range 0.5 MHz to 5 MHz, Color - Blue
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
X (cm) |
A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-1 | .125 | .062 | .050 | .74 | .010 | .007 | 48 |
T-16-1 | .160 | .078 | .060 | .95 | .016 | .015 | 44 |
T-20-1 | .200 | .088 | .070 | 1.15 | .025 | .029 | 52 |
T-25-1 | .255 | .120 | .096 | 1.50 | .042 | .063 | 70 |
T-30-1 | .307 | .151 | .128 | 1.83 | .065 | .119 | 85 |
T-37-1 | .375 | .205 | .128 | 2.32 | .070 | .162 | 80 |
T-44-1 | .440 | .229 | .159 | 2.67 | .107 | .286 | 105 |
T-50-1 | .500 | .303 | .190 | 3.03 | .121 | .367 | 100 |
T-68-1 | .69 | .370 | .190 | 4.24 | .196 | .831 | 115 |
T-80-1 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 115 |
T-94-1 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 160 |
T-106-1 | 1.060 | .570 | .437 | 6.50 | .690 | 4.485 | 325 |
T-130-1 | 1.300 | .780 | .437 | 8.29 | .730 | 6.052 | 200 |
T-157-1 | 1.570 | .950 | .570 | 10.05 | 1.140 | 11.457 | 320 |
T-184-1 | 1.840 | .950 | .710 | 11.12 | 2.040 | 22.685 | 500 |
T-200-1 | 2.000 | 1.250 | .550 | 12.97 | 1.330 | 17.250 | 250 |
Note:
Most cores can be very useful well below the lower frequency limits shown here.
MATERIAL 2 -- Permeability 10, Freq. Range 2 MHz to 30 MHz, Color - Red
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-2 | .125 | .062 | .050 | .74 | .010 | .007 | 20 |
T-16-2 | .160 | .078 | .060 | .95 | .016 | .015 | 22 |
T-20-2 | .200 | .088 | .070 | 1.15 | .025 | .029 | 25 |
T-25-2 | .255 | .120 | .096 | 1.50 | .042 | .063 | 34 |
T-30-2 | .307 | .151 | .128 | 1.83 | .065 | .119 | 43 |
T-37-2 | .375 | .205 | .128 | 2.32 | .070 | .162 | 40 |
T-44-2 | .440 | .229 | .159 | 2.67 | .107 | .286 | 52 |
T-50-2 | .500 | .303 | .190 | 3.03 | .121 | .367 | 49 |
T-68-2 | .690 | .370 | .190 | 4.24 | .196 | .831 | 57 |
T-80-2 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 55 |
T-94-2 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 84 |
T-106-2 | 1.060 | .780 | .437 | 6.50 | .690 | 4.485 | 135 |
T-130-2 | 1.300 | .950 | .437 | 8.29 | .730 | 6.052 | 110 |
T-157-2 | 1.570 | .950 | .570 | 10.05 | 1.140 | 11.457 | 140 |
T-184-2 | 1.840 | 1.250 | .710 | 11.12 | 2.040 | 22.685 | 240 |
T-200-2 | 2.000 | 1.250 | .550 | 12.97 | 1.330 | 17.250 | 120 |
T-200A-2 | 2.000 | 1.405 | 1.000 | 12.97 | 2.240 | 29.050 | 218 |
T-225-2 | 2.250 | 1.485 | .550 | 14.56 | 1.508 | 21.956 | 120 |
T-225A-2 | 2.250 | 1.250 | 1.000 | 14.56 | 2.730 | 39.749 | 215 |
T-300-2 | 3.058 | 1.925 | .500 | 19.83 | 1.810 | 35.892 | 114 |
T-300A-2 | 3.048 | 1.925 | 1.000 | 19.83 | 3.580 | 70.991 | 228 |
T-400-2 | 4.000 | 2.250 | .650 | 24.93 | 3.660 | 91.244 | 180 |
T-400A-2 | 4.000 | 2.250 | 1.300 | 24.93 | 7.432 | 185.250 | 360 |
T-520-2 | 5.200 | 3.080 | .800 | 33.16 | 5.460 | 181.000 | 207 |
MATERIAL 3 -- Permeability 35, Freq. Range 0.05 MHz to 0.5 MHz, Color - Gray
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-3 | .125 | .062 | .050 | .74 | .010 | .007 | 60 |
T-16-3 | .160 | .078 | .060 | .95 | .016 | .015 | 61 |
T-20-3 | .200 | .088 | .070 | 1.15 | .025 | .029 | 76 |
T-25-3 | .255 | .120 | .096 | 1.50 | .042 | .063 | 100 |
T-30-3 | .307 | .151 | .128 | .183 | .065 | .119 | 140 |
T-37-3 | .375 | .205 | .128 | 2.32 | .070 | .162 | 120 |
T-44-3 | .440 | .229 | .159 | 2.67 | .107 | .286 | 180 |
T-50-3 | .500 | .303 | .190 | 3.03 | .121 | .367 | 175 |
T-68-3 | .690 | .370 | .190 | 4.24 | .196 | .831 | 195 |
T-80-3 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 180 |
T-94-3 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 248 |
T-106-3 | 1.060 | .570 | .437 | 6.50 | .690 | 4.485 | 450 |
T-130-3 | 1.300 | .780 | .437 | 8.29 | .730 | 6.052 | 350 |
T-157-3 | 1.570 | .950 | .570 | 10.05 | 1.140 | 11.457 | 420 |
T-184-3 | 1.840 | .950 | .710 | 11.12 | 2.040 | 22.685 | 720 |
T-200-3 | 2.000 | 1.250 | .550 | 12.97 | 1.330 | 17.250 | 425 |
T-200A-3 | 2.000 | 1.250 | 1.000 | 12.97 | 2.240 | 29.050 | 460 |
T-225-3 | 2.250 | 1.405 | .550 | 14.56 | 1.508 | 21.956 | 425 |
MATERIAL 6-- Permeability 8, Freq. Range 10 MHz to 50 MHz, Color - Yellow
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-6 | .125 | .062 | .050 | .74 | .010 | .007 | 17 |
T-16-6 | .160 | .078 | .060 | .95 | .016 | .015 | 19 |
T-20-6 | .200 | .088 | .070 | 1.15 | .025 | .029 | 22 |
T-25-6 | .255 | .120 | .096 | 1.50 | .042 | .063 | 27 |
T-30-6 | .307 | .151 | .128 | .183 | .065 | .119 | 36 |
T-37-6 | .375 | .205 | .128 | 2.32 | .070 | .162 | 30 |
T-44-6 | .440 | .229 | .159 | 2.67 | .107 | .286 | 42 |
T-50-6 | .500 | .303 | .190 | 3.03 | .121 | .367 | 46 |
T-68-6 | .690 | .370 | .190 | 4.24 | .196 | .831 | 47 |
T-80-6 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 45 |
T-94-6 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 70 |
T-106-6 | 1.060 | .570 | .437 | 6.50 | .690 | 4.485 | 116 |
T-130-6 | 1.300 | .780 | .437 | 8.29 | .730 | 6.052 | 96 |
T-157-6 | 1.570 | .950 | .570 | 10.05 | 1.140 | 11.457 | 115 |
T-184-6 | 1.840 | .950 | .710 | 11.12 | 2.040 | 22.685 | 195 |
T-200-6 | 2.000 | 1.250 | .550 | 12.97 | 1.330 | 17.250 | 100 |
T-200A-6 | 2.000 | 1.250 | 1.000 | 12.97 | 2.240 | 29.050 | 180 |
T-225-6 | 2.250 | 1.405 | .550 | 14.56 | 1.508 | 21.956 | 100 |
MATERIAL 7 -- Permeability 9, Freq. Range 3 MHz to 35 MHz, Color - White
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-25-7 | .255 | .120 | .096 | 1.50 | .042 | .063 | 29 |
T-37-7 | .375 | .205 | .128 | 2.32 | .070 | .162 | 32 |
T-50-7 | .500 | .303 | .190 | 3.03 | .121 | .367 | 43 |
T-68-7 | .690 | .370 | .190 | 4.24 | .196 | .831 | 52 |
MATERIAL 10-- Permeability 6, Freq. Range 30 MHz to 100 MHz, Color - Black
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-10 | .125 | .062 | .050 | .74 | .010 | .007 | 12 |
T-16-10 | .160 | .078 | .060 | .95 | .016 | .015 | 13 |
T-20-10 | .200 | .088 | .070 | 1.15 | .025 | .029 | 16 |
T-25-10 | .255 | .120 | .096 | 1.50 | .042 | .063 | 19 |
T-30-10 | .307 | .151 | .128 | .183 | .065 | .119 | 25 |
T-37-10 | .375 | .205 | .128 | 2.32 | .070 | .162 | 25 |
T-44-10 | .440 | .229 | .159 | 2.67 | .107 | .286 | 33 |
T-50-10 | .500 | .303 | .190 | 3.03 | .121 | .367 | 31 |
T-68-10 | .690 | .370 | .190 | 4.24 | .196 | .831 | 32 |
T-80-10 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 32 |
T-94-10 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 58 |
MATERIAL 12-- Permeability 4, Freq. Range 50 MHz to 200 MHz, Color - Green & White
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-12 | .125 | .062 | .050 | .74 | .010 | .007 | 7.5 |
T-16-12 | .160 | .078 | .060 | .95 | .016 | .015 | 8.0 |
T-20-12 | .200 | .088 | .070 | 1.15 | .025 | .029 | 10 |
T-25-12 | .255 | .120 | .096 | 1.50 | .042 | .063 | 12.0 |
T-30-12 | .307 | .151 | .128 | .183 | .065 | .119 | 16.0 |
T-37-12 | .375 | .205 | .128 | 2.32 | .070 | .162 | 15.0 |
T-44-12 | .440 | .229 | .159 | 2.67 | .107 | .286 | 18.5 |
T-50-12 | .500 | .303 | .190 | 3.03 | .121 | .367 | 18.0 |
T-68-12 | .690 | .370 | .190 | 4.24 | .196 | .831 | 21.0 |
T-80-12 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 22.0 |
T-94-12 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 32.0 |
MATERIAL 15-- Permeability 25, Freq. Range 0.1 MHz to 2.0 MHz, Color - Red & White
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-15 | .125 | .062 | .050 | .74 | .010 | .007 | 50 |
T-16-15 | .160 | .078 | .060 | .95 | .016 | .015 | 55 |
T-20-15 | .200 | .088 | .070 | 1.15 | .025 | .029 | 65 |
T-25-15 | .255 | .120 | .096 | 1.50 | .042 | .063 | 85 |
T-30-15 | .307 | .151 | .128 | .183 | .065 | .119 | 93 |
T-37-15 | .375 | .205 | .128 | 2.32 | .070 | .162 | 90 |
T-44-15 | .440 | .229 | .159 | 2.67 | .107 | .286 | 160 |
T-50-15 | .500 | .303 | .190 | 3.03 | .121 | .367 | 135 |
T-68-15 | .690 | .370 | .190 | 4.24 | .196 | .831 | 180 |
T-80-15 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 170 |
T-94-15 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 200 |
T-106-15 | 1.060 | .570 | .437 | 6.50 | .690 | 4.485 | 345 |
T-130-15 | 1.300 | .780 | .437 | 8.29 | .730 | 6.052 | 250 |
T-157-15 | 1.570 | .950 | .570 | 10.05 | 1.140 | 11.457 | 360 |
MATERIAL 17-- Permeability 4, Freq. Range 20 MHz to 200 MHz, Color - Blue & Yellow
Core Number | O.D. (inches) |
I.D. (inches) |
Hgt (inches) |
l_{e }(cm) | A_{e }(cm)^{2} | V_{e }(cm)^{3} | A_{L}
Value µh/100 Turns |
T-12-17 | .125 | .062 | .050 | .74 | .010 | .007 | 7.5 |
T-16-17 | .160 | .078 | .060 | .95 | .016 | .015 | 8.0 |
T-20-17 | .200 | .088 | .070 | 1.15 | .025 | .029 | 10.0 |
T-25-17 | .255 | .120 | .096 | 1.50 | .042 | .063 | 12.0 |
T-30-17 | .307 | .151 | .128 | .183 | .065 | .119 | 16.0 |
T-37-17 | .375 | .205 | .128 | 2.32 | .070 | .162 | 15.0 |
T-44-17 | .440 | .229 | .159 | 2.67 | .107 | .286 | 18.5 |
T-50-17 | .500 | .303 | .190 | 3.03 | .121 | .367 | 18.0 |
T-68-17 | .690 | .370 | .190 | 4.24 | .196 | .831 | 21.0 |
T-80-17 | .795 | .495 | .250 | 5.15 | .242 | 1.246 | 32.0 |
T-90-17 | .942 | .560 | .312 | 6.00 | .385 | 2.310 | 32.0 |