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toroids & squaroids
 

Ferrite: Toroids and Squaroids

applications: antennas, power supplies, pulse & wide band transformers, emi supression

core constant
effective path length
effective cross sectional area
effective core volume
Toroids
outside diameter
inside diameter
thickness
mass
å l/A
le
Ae
Ve
p/n
in.
(mm)
in.
(mm)
in.
(mm)
grams
cm-1
cm
cm2
cm3
T-
1038
0.052
1.32
0.032
0.81
0.040
1.02
0.004
127.4
0.32
0.003
0.0008
1341
0.062
1.57
0.027
0.69
0.027
0.69
0.005
110.2
0.32
0.003
0.0009
1048
0.080
2.03
0.035
0.89
0.055
1.40
0.018
54.4
0.41
0.008
0.0031
1131
0.080
2.03
0.050
1.27
0.050
1.27
0.012
105.3
0.50
0.005
0.0024
1143
0.100
2.54
0.050
1.27
0.050
1.27
0.023
71.4
0.55
0.008
0.0043
1410
0.105
2.67
0.070
1.78
0.050
1.27
0.019
122.0
0.68
0.006
0.0038
1020
0.120
3.05
0.070
1.78
0.060
1.52
0.04
76.5
0.72
0.009
0.0068
1028
0.135
3.43
0.040
1.02
0.050
1.27
0.05
40.7
0.55
0.014
0.0075
980
0.138
3.51
0.051
1.30
0.050
1.27
0.05
49.7
0.64
0.013
0.0083
1032-2
0.138
3.51
0.070
1.78
0.050
1.27
0.04
72.9
0.77
0.011
0.0081
1010
0.155
3.94
0.088
2.24
0.050
1.27
0.05
87.4
0.92
0.011
0.0097
1056
0.175
4.45
0.077
1.96
0.050
1.27
0.08
60.3
0.90
0.015
0.013
985-1
0.200
5.08
0.100
2.54
0.050
1.27
0.09
71.4
1.11
0.015
0.017
434
0.230
5.84
0.120
3.05
0.120
3.05
0.29
31.7
1.30
0.041
0.054
1057
0.237
6.02
0.070
1.78
0.120
3.05
0.38
16.9
0.97
0.057
0.055
1146
0.241
6.12
0.112
2.84
0.120
3.05
0.34
26.9
1.28
0.048
0.061
1023
0.250
6.35
0.131
3.33
0.187
4.75
0.5
20.5
1.42
0.069
0.098
1012
0.300
7.62
0.120
3.05
0.187
4.75
0.9
14.4
1.46
0.101
0.148
131-1
0.310
7.87
0.180
4.57
0.187
4.75
0.7
24.3
1.86
0.077
0.142
994
0.375
9.53
0.187
4.75
0.125
3.18
0.8
28.4
2.07
0.073
0.15
999
0.495
12.57
0.168
4.27
0.250
6.35
3.4
9.2
2.19
0.239
0.53
975
0.495
12.57
0.224
5.69
0.250
6.35
3.0
12.5
2.59
0.207
0.54
560
0.495
12.57
0.277
7.04
0.250
6.35
2.6
17.0
2.91
0.171
0.50
318
0.500
12.70
0.295
7.49
0.250
6.35
2.5
18.8
3.03
0.162
0.49
998
0.500
12.70
0.312
7.92
0.250
6.35
2.4
21.0
3.12
0.149
0.46
962
0.595
15.11
0.258
6.55
0.250
6.35
4.5
11.8
3.04
0.256
0.78
1063
0.625
15.88
0.291
7.39
0.250
6.35
4.8
12.9
3.32
0.257
0.85
1096
0.632
16.05
0.325
8.26
0.250
6.35
4.6
14.9
3.55
0.239
0.85
964
0.700
17.78
0.390
9.91
0.250
6.35
5.3
16.9
4.11
0.243
1.00
1441
0.755
19.18
0.419
10.64
0.250
6.35
6.1
16.8
4.42
0.263
1.16
663
0.870
22.10
0.540
13.72
0.250
6.35
7.3
20.7
5.4
0.261
1.41
1015-1
1.000
25.40
0.500
12.70
0.250
6.35
12
14.3
5.5
0.39
2.14
961
1.170
29.72
0.760
19.30
0.250
6.35
12
22.9
7.5
0.326
2.43
665
1.250
31.75
0.750
19.05
0.375
9.53
23
12.9
7.6
0.59
4.5
1100
1.395
35.43
0.641
16.28
0.375
9.53
36
8.5
7.4
0.87
6.4
1442
1.490
37.85
1.087
27.61
0.375
9.53
24
20.9
10.1
0.48
4.9
1086
1.550
39.37
0.965
24.51
0.375
9.53
34
13.9
9.7
0.69
6.7
1090
1.785
45.34
0.770
19.56
0.375
9.53
61
7.8
9.1
1.16
10.5
682
1.855
47.12
0.450
11.43
0.375
9.53
76
4.7
6.7
1.44
9.7
989
2.400
60.96
1.400
35.56
0.500
12.70
118
9.2
14.5
1.57
22.8
987
3.100
78.74
1.865
47.37
0.500
12.70
191
9.7
19.0
1.95
37.0
1337
3.320
84.33
1.725
43.82
0.500
12.70
251
7.6
18.8
2.48
46.6
1043
3.400
86.36
1.760
44.70
0.500
12.70
264
7.5
19.2
2.55
48.9
995
3.500
88.90
2.000
50.80
0.500
12.70
257
8.8
20.8
2.36
49.1
1443
4.300
109.22
2.785
70.74
0.500
12.70
335
11.4
27.4
2.41
65.9
1113
4.320
109.73
1.875
47.63
0.500
12.70
472
5.9
22.1
3.72
82.1
1044
4.420
112.27
2.490
63.25
0.500
12.70
416
8.6
26.1
3.03
79.1
1054
5.475
139.07
3.975
100.97
0.500
12.70
442
15.5
37.1
2.40
88.9
1009
5.725
145.42
2.440
61.98
1.000
25.40
1,672
2.9
28.9
9.98
288.7
1112
6.260
159.00
1.995
50.67
1.000
25.40
2,195
2.2
26.7
12.35
330.0
1006
6.260
159.00
3.875
98.43
1.000
25.40
1,507
5.2
38.9
7.55
293.8
1182
6.260
159.00
4.545
115.44
1.000
25.40
1,155
7.7
42.4
5.49
232.5
1078
9.500
241.30
7.000
177.80
1.000
25.40
2,572
8.1
64.8
8.00
518.7
Squaroids
length & width
id
th
mass
å l/A
le
Ae
Ve
S-
1149
0.079
2.01
0.036
0.91
0.060
1.52
0.025
52.5
0.4
0.01
0.003
1301
0.236
5.99
0.118
3.00
0.445
11.30
1.6
8.0
1.3
0.16
0.2
1445
0.250
6.35
0.083
2.11
0.125
3.18
0.6
17.9
1.1
0.06
0.1
1390
0.354
8.99
0.156
3.96
0.125
3.18
1.1
24.2
1.8
0.08
0.1
1391
0.354
8.99
0.187
4.75
0.125
3.18
1.0
31.0
2.0
0.07
0.1
1186
0.394
10.01
0.197
5.00
0.531
13.49
5.3
6.7
2.2
0.32
0.7
1446
0.505
12.83
0.134
3.40
0.125
3.18
2.4
14.9
1.9
0.13
0.2
1160
1.000
25.40
0.400
10.16
0.500
12.70
35
5.4
4.9
0.90
4.4
1360
1.265
32.13
0.465
11.81
0.500
12.70
57
4.9
5.9
1.19
7.0
1161
1.400
35.56
0.600
15.24
0.600
15.24
80
4.9
7.1
1.46
10.4
notes:
1) material designation will be a prefix for NiZn materials (ie.M-1010) or a suffix for MnZn materials (ie. T-1010-M50)
2) magnetic (inductance) tolerance +/-20% (for ui 7.5 - 5,000) and +/-30% (for ui> 5,000)
      note: automated grading/sorting of toroids (od < 0.375) for tighter inductance tolerances available
3) mechanical tolerances approximately +/-1.5% (nominal values may vary per material)
4) thickness adjustable to suit application requirements (given existing tool limitations)
5) call if required sizes not found (not all tool sizes are listed), also see Beads
6) parts available coated with parylene (0.0005 in. nominal) or epoxy (>0.001 in.) (ie. T-1010P-M50 or M-995E)

 

 

National Magnetics Group | TCI Ceramics
Manufacturers of technical ceramics (magnetic and advanced materials) and powdered iron cores

Corporate Headquarters
1210 Win Drive, Bethlehem, Pennsylvania 18017-7061 USA | Tel: 610-867-7600 | Fax: 610-867-0200

Ferrites and Magnets: sales@magneticsgroup.com | Microwave and Advanced Materials: sales@tciceramics.com