Iron powder core magnetic ring model specification sheet

Filter 10.7M
Material serial number Basic iron powder Material permeability μ Temperature stability (ppm/°C) Resonant circuit frequency range (MHz) Color mark
0 Phenolic 1 0 838 Electronics 100.0 - 300.0 tan
1 C type carbonyl 20 280 0.5 - 5.0 Blue blue
2 E-carbonyl 10 95 2.0 - 30.0 Red red
3 HP type carbonyl 35 370 0.05 - 0.5 Grey gray
6 SF type carbonyl 8 35 10.0 - 50.0 Yellow yellow
7 TH type carbonyl 9 30 5.0 - 35.0 White white
10 W type carbonyl 6 150 30.0 - 100.0 Black black
12 Synthetic oxide 4 170* 50.0 - 200.0 Green/White Green/White
15 GS6 type carbonyl 25 190 0.10 - 2.0 Red/White Red/White
17 Carbonyl 4 50 50.00 - 200.0 Blue/Yellow Blue/Yellow
26 special 75 882

Low frequency filter

Yellow/White Yellow/White

Material serial number: 0 -- permeability 1, frequency range 100 MHz - 300 MHz, color - tan

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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

Material Number: 1 -- Permeability 20, Frequency. Range 0.5 MHz to 5 MHz, Color - Blue

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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

Material Number: 2 -- Magnetic Permeability 10, Frequency Range 2 MHz to 30 MHz, Color - Red

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
T-12-2 .125 .062 .050 .74 .010 .007 20
T-16-2 .160 .078 .060 .95 .016 .015 twenty two
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 serial number: 3 -- permeability 35, frequency range 0.05 MHz to 0.5 MHz, color - gray

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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 serial number: 6-- magnetic permeability 8, frequency range 10 MHz to 50 MHz, color - yellow

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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 twenty two
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 Number: 7 -- Magnetic Permeability 9, Frequency Range 3 MHz to 35 MHz, Color - White

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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 serial number: 10 - magnetic permeability 6, frequency range 30 MHz to 100 MHz, color - black

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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 serial number: 12-- magnetic permeability 4, frequency range 50 MHz to 200 MHz, color - green white

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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 serial number: 15 - magnetic permeability 25, frequency range 0.1 MHz to 2.0 MHz, color - red white

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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 serial number: 17-- magnetic permeability 4, frequency range 20 MHz to 200 MHz, color - blue and yellow

model Outer diameter.
(inch) 		the inside diameter of
(inch) 		high
(inch) 		l e magnetic path length
(cm) 		A e cross-sectional area
(cm) 2 		V e core effective volume
(cm) 3 		A L value μh/100 circle
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

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