RF Toroids T20-1 thru T520-2

---
MAGNETIC DIMENSIONS
MICROMETALS
Part No.
AL
nH/N2
OD
in/mm
ID
in/mm
Ht
in/mm

cm
A
cm2
V
cm3

T20-1
5.2
.200/5.08
.088/2.24
.070/1.78
1.15
.023
.026

T20-2
2.5

T20-3
7.6

T20-6
2.2

T20-7
2.4

T20-10
1.6

T20-12
1.0

T20-15
6.5

T20-17
1.0

T20-0
.35
-

T22-2
5.5
.223/5.66
.097/2.46
.143/3.63
1.28
.052
.067

T22-6
4.5

T22-10
3.2
-

T25-1
7.0
.255/6.48
.120/3.05
.096/2.44
1.50
.037
.055

T25-2
3.4

T25-3
10.0

T25-6
2.7

T25-7
2.9

T25-10
1.9

T25-12
1.2

T25-15
8.5

T25-17
1.2

T25-0
.45
-

T27-2
3.3
.280/7.11
.151/3.84
.128/3.25
1.71
.047
.080

T27-6
2.7

T27-10
2.2

T27-12
1.5

T27-17
1.3

T27-0
.45
-

T30-1
8.5
.307/7.80
.151/3.84
.128/3.25
1.84
.061
.110

T30-2
4.3

T30-3
14.0

T30-6
3.6

T30-7
3.7

T30-10
2.5

T30-12
1.6

T30-15
9.3

T30-17
1.6

T30-0
.6
---
MAGNETIC DIMENSIONS
MICROMETALS
Part No.
AL
nH/N2
OD
in/mm
ID
in/mm
Ht
in/mm

cm
A
cm2
V
cm3

T37-1
8.0
.375/9.53
.205/5.21
.128/3.25
2.31
.064
.147

T37-2
4.0

T37-3
12.0

T37-6
3.0

T37-7
3.2

T37-10
2.5

T37-12
1.5

T37-15
9.0

T37-17
1.5

T37-0
.49
-

T44-1
10.5
.440/11.2
.229/5.82
.159/4.04
2.68
.099
.266

T44-2
5.2

T44-3
18.0

T44-6
4.2

T44-7
4.6

T44-10
3.3

T44-12
1.85

T44-15
16.0

T44-17
1.85

T44-0
.65
-

T44-2A
3.6
.440/11.2
.229/5.82
.128/3.25
2.68
.080
.215
-

T50-1
10.0
.500/12.7
.303/7.70
.190/4.83
3.19
.112
.358

T50-2
4.9

T50-3
17.5

T50-6
4.0

T50-7
4.3

T50-10
3.1

T50-12
1.8

T50-15
13.5

T50-17
1.8

T50-0
.64
-

T51-2B
13.8
.500/12.7
.200/5.08
.312/7.92
2.79
.282
.786

T51-6B
10.2
-

T60-2
6.5
.600/15.2
.336/8.53
.234/5.94
3.74
.187
.699

T60-6
5.5
-

T68-1
11.5
.690/17.5
.370/9.40
.190/4.83
4.23
.179
.759

T68-2
5.7

T68-3
19.5

T68-6
4.7
---
MAGNETIC DIMENSIONS
MICROMETALS
Part No.
AL
nH/N2
OD
in/mm
ID
in/mm
Ht
in/mm

cm
A
cm2
V
cm3

T68-7
5.2
.690/17.5
.370/9.40
.190/4.83
4.23
.179
.759

T68-10
3.2

T68-12
2.1

T68-15
18.0

T68-17
2.1

T68-0
.75
-

T68-2A
7.0
.690/17.5
.370/9.40
.250/6.35
4.23
.242
1.03

T68-3A
26.0

T68-6A
6.2

T68-7A
7.3
-

T72-2
12.8
.720/18.3
.280/7.11
.260/6.60
4.01
.349
1.40

T72-3
36.0

T72-7
9.5
-

T80-1
11.5
.795/20.2
.495/12.6
.250/6.35
5.14
.231
1.19

T80-2
5.5

T80-3
18.0

T80-6
4.5

T80-10
3.2

T80-12
2.2

T80-15
17.0

T80-17
2.2

T80-0
.85
-

T80-7B
8.4
.795/20.2
.495/12.6
.375/9.53
5.14
.346
1.78
-

T94-1
16.0
.942/23.9
.560/14.2
.312/7.92
5.97
.362
2.16

T94-2
8.4

T92-3
24.8

T94-6
7.0

T94-10
5.8

T94-15
20.0

T94-17
2.9

T94-0
1.06
-

T106-1
32.5
1.060/26.9
.570/14.5
.437/11.1
6.49
.659
4.28

T106-2
13.5

T106-3
45.0

T106-6
11.6

T106-7
13.3

T106-15
34.5

T106-17
5.1

T106-0
1.9
---
MAGNETIC DIMENSIONS
MICROMETALS
Part No.
AL
nH/N2
OD
in/mm
ID
in/mm
Ht
in/mm

cm
A
cm2
V
cm3

T130-1
20.0
1.300/33.0
.780/19.8
.437/11.1
8.28
.698
5.78

T130-2
11.0

T130-3
35.0

T130-6
9.6

7130-7
10.3

T130-15
25.0

T130-17
4.0

T130-0
1.5
-

T157-1
32.0
1.570/39.9
.950/24.1
.570/14.5
10.1
1.06
10.7

T157-2
14.0

T157-3
42.0

T157-6
11.5

T157-17
5.3
-

T175-2
15.0
1.750/44.5
1.070/27.2
.650/16.5
11.2
1.34
15.0

T175-6
12.5
-

T184-1
50.0
1.840/46.7
.950/24.1
.710/18.0
11.2
1.88
21.0

T184-2
24.0

T184-3
72.0

T184-6
19.5

T184-17
8.7
-

T200-1
25.0
2.000/50.8
1.250/31.8
.550/14.0
13.0
1.27
16.4

T200-2
12.0

T200-3
42.5

T200-6
10.0

T200-7
10.5
-

T200-2B
21.8
2.000/50.8
1.250/31.8
1.000/25.4
13.0
2.32
30.0
-

T225-2
12.0
2.250/57.2
1.400/35.6
.550/14.0
14.6
1.42
20.7

T225-3
42.5

T225-6
10.0
-

T225-2B
21.5
2.250/57.2
1.400/35.6
1.000/25.4
14.6
2.59
37.8
-

T300-2
11.4
3.040/77.2
1.930/49.0
.500/12.7
19.8
1.68
33.4
-

T300-2D
22.8
3.040/77.2
1.930/49.0
1.000/25.4
19.8
3.78
67.0
-

T400-2
18.0
4.000/102
2.250/57.2
.650/16.5
25.0
3.46
86.4
-

T400-2D
36.0
4.000/102
2.250/57.2
1.300/33.0
25.0
6.85
171
-

T520-2
20.0
5.200/132
3.808/78.2
.800/20.3
33.1
5.24
173

General Material Properties for RF Materials
Material Mix No.
Basic Iron Powder
Material Permeability (µ°)
Temperature1 Stability (ppm /°C)
Relative Cost
Toroidal Color Code
-1
Carbonyl C
20
280
2.7
Blue/Clear
-2
Carbonyl E
10
95
1.7
Red/Clear
-3
Carbonyl HP
35
370
2.5
Grey/Clear
-4
Carbonyl J
9.0
280
2.0
Blue/White
-6
Carbonyl SF
8.5
35
2.0
Yellow/Clear
-7
Carbonyl TH
9.0
30
2.0
White/Clear
-8
Carbonyl GQ4
35
255
2.5
Orange/Clear
-10
Carbonyl W
6.0
150
4.7
Black/Clear
-12*
Carbonyl Oxide
4.0
170**
1.5
Green/White
-15
Carbonyl GS6
25
190
3.1
Red/White
-17
Carbonyl
4.0
50
3.1
Blue/Yellow
-42
Hydrogen Reduced
40
550
1.4
Blue/Red
-0
Phenolic
1
0
1.0
Tan/Tan

1 Temperature stability values, averaged from -55C° to +125C° are listed for closed magnet structures.
*Non-linear
**Mix 17 was developed as a temperature stable alternative to mix 12 and is recommended for all new designs.
Note: For information an Mix #'s 8, 18, 26, 28, 33, 40 and 52 see Micrometals Catalog 4 for Power Conversion and Line Filter Applications.

Resonant Circuit1 (****) and Broadband Frquency Range (-----)

Mix No.
Range MHz

2KHz to 50KHz

50KHz to 250KHz

250KHz to 500KHz

500KHz to 2MHz

2MHz to 10MHz

10MHz to 40MHz

40MHz to 150MHz

150MHz to 250MHz

250MHz to 500MHz

500MHz to 1GHz

42

0.3-80
******









3

.02-1
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8

.02-1
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1

.15-3

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15

.15-3

************************






2

.25-10


****************************





7

1-25



********************





4

3-40




*************





6

3-40




*************


-----------


10

15-100





************


-----------

17

20-200





******************



12

30-250





******************



0

50-350







***************** --

------

*Resonant frequency range is given to optimize Q and core loss.
Materials can be used outside resonant frequency range where optimum Q is not required.