Toroids
Product ID: T0100 to T0325 T0100 to T0325 (less than 8.5 mm / 0.335 inch)
Steward′s ferrite toroids provide high performance when wound and used as cores for transformers, inductors, or chokes. A variety of materials and core sizes allow performance to be optimized for application size and frequency. Steward offers materials which provide the high inductance and low losses desired for high frequency transformers, materials which provide high impedance for low frequency EMI suppression, and materials which provide high impedance for high frequency EMI suppression. Small-sized, custom part shapes are also available in Steward 35 and 40 materials for specialized filtering applications.
Applications: ⊕ LAN matching and isolation transformers ⊕ LAN common mode chokes ⊕ Power supply common mode chokes ⊕ Inductors ⊕ Current sensing transformers ⊕ DC-DC converters ⊕ Telecommunications transformers ⊕ Telecommunications chokes ⊕ CAN-Bus Chokes ⊕ Lighting Ballasts ⊕ Ground Fault Interuptor Applications ⊕ EMI filters
Features:
Steward 35 and 40 material ferrite toroids provide low losses and high performance in transformers at kHz to low MHz frequencies
Steward 35 and 40 material ferrite toroids provide high impedance below 10MHz for suppression of undesired signals
Steward 28 material ferrite toroids provide high impedance from 10MHz to over 500MHz
P coating is parylene with typical thickness of 0.0005 inch. Hipot rating is 1000 VAC minimum
See more complete detail
MATERIALS
PARAMETER
SYMBOL
UNIT
25
28
38
46
36
35
56
39
42
40
Relative Initial Permeability
μi
125
850
1700
4000
4500
5000
5500
7000
7500
10000
AL Tolerance
%
± 30
± 20
± 30
± 25
± 25
± 20
± 25
± 25
± 25
± 30
Saturation Flux Density
Bs
Gauss
3600
3250
3000
4500
4500
4500
4500
3800
4100
3800
mT
360
325
300
450
450
450
450
380
410
380
at Field Intensity
H
Oersteds
10
10
10
10
10
10
10
12.5
10
10
A/m
800
800
800
800
800
800
800
1000
800
800
Residual Flux Density
Br
Gauss
2600
2000
1500
1000
1000
1000
1000
730
1100
1400
mT
260
200
150
100
100
100
100
73
110
140
Coercive Force
Hc
Oersteds
1.60
0.40
0.20
0.10
0.10
0.10
0.10
0.10
0.10
0.04
A/m
127
3
16
8
8
8
8
8
8
3
Relative Loss Factor
tan δ μ i
10-6
740
91
53
10
10
20
15
< 8
6
5
at Frequency
f
MHz
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.010
0.010
0.10
Curie Temperature
Tc
°C
> 225
> 175
> 120
> 150
> 150
> 150
> 130
> 130
> 130
> 120
Resistivity
Ρ
Ω-cm
106
105
105
102
102
102
102
35
10
1
Density
g/cm3
4.9
4.9
4.8
4.8
4.8
4.8
4.8
4.9
4.8
4.8
Part Number
MM
INCHES
Wt/k kgs
Ie mm
Ae mm2
Ve mm3
C1 mm-1
MLT mm/Turn
OD
ID
HT
OF
ID
HT
*T0100-00P
2.54
1.27
1.27
0.100
0.050
0.050
0.02
5.531
0.775
4.286
7.138
3.81
*T0100-20P
2.54
1.27
0.76
0.100
0.050
0.030
0.01
5.531
0.465
2.572
11.896
2.79
*T0100-30P
2.54
1.27
0.99
0.100
0.050
0.039
0.02
5.531
0.604
3.343
9.151
3.25
*T0100-40P
2.54
1.27
2.54
0.100
0.050
0.100
0.05
5.531
1.550
8.572
3.569
6.35
*T0101-10P
2.54
1.50
0.99
0.100
0.059
0.039
0.02
6.059
0.504
3.054
12.021
3.02
*T0115-00P
2.92
1.63
1.78
0.115
0.064
0.070
0.04
6.749
1.119
7.553
6.030
4.85
*T0115-10P
2.92
1.63
2.41
0.115
0.064
0.095
0.05
6.749
1.519
10.251
4.443
6.12
*T0119-00P
3.05
1.27
1.27
0.120
0.050
0.050
0.04
5.988
1.060
6.345
5.651
4.32
*T0119-10P
3.05
1.27
0.76
0.120
0.050
0.030
0.02
5.988
0.636
3.807
9.419
3.30
*T0119-20P
3.05
1.27
0.86
0.120
0.050
0.034
0.03
5.988
0.721
4.314
8.310
3.51
*T0119-40P
3.05
1.27
2.54
0.120
0.050
0.100
0.07
5.988
2.119
12.690
2.826
6.86
*T0120-00P
3.05
1.78
1.52
0.120
0.070
0.060
0.04
7.226
0.945
6.826
7.649
4.32
*T0120-80P
3.05
1.78
2.03
0.120
0.070
0.080
0.05
7.226
1.260
9.101
5.737
5.33
*T0121-20P
3.05
1.52
2.06
0.120
0.060
0.081
0.05
6.637
1.506
10.000
4.406
5.64
*T0122-00P
3.05
1.65
1.65
0.120
0.065
0.065
0.04
6.938
1.118
7.755
6.207
4.70
*T0122-30P
3.05
1.65
2.39
0.120
0.065
0.094
0.06
6.938
1.616
11.215
4.292
6.17
*T0130-00P
3.30
1.27
1.27
0.130
0.050
0.050
0.05
6.195
1.196
7.412
5.178
4.57
*T0135-00P
3.43
1.78
1.27
0.135
0.070
0.050
0.04
7.619
1.011
7.707
7.533
4.19
*T0135-10P
3.43
1.78
2.06
0.135
0.070
0.081
0.07
7.619
1.639
12.485
4.650
5.77
*T0135-20P
3.43
1.78
0.86
0.135
0.070
0.034
0.03
7.619
0.688
5.241
11.078
3.38
*T0135-30P
3.43
1.78
2.54
0.135
0.070
0.100
0.08
7.619
2.023
15.414
3.766
6.73
*T0135-40P
3.43
1.78
1.78
0.135
0.070
0.070
0.06
7.619
1.416
10.790
5.381
5.21
*T0135-60P
3.43
1.78
1.52
0.135
0.070
0.060
0.05
7.619
1.214
9.248
6.277
4.70
*T0137-00P
3.43
1.52
0.76
0.135
0.060
0.030
0.03
6.989
0.687
4.803
10.168
3.43
*T0145-00P
3.68
1.65
2.54
0.145
0.065
0.100
0.11
7.543
2.447
18.454
3.083
7.11
*T0153-00P
3.94
1.78
1.27
0.155
0.070
0.050
0.06
8.097
1.301
10.534
6.224
4.70
*T0153-40P
3.94
1.78
2.54
0.155
0.070
0.100
0.12
8.097
2.602
21.068
3.112
7.24
Custom Parts Also Available
Number
AL ( nH per turn squared )
Common Mode
DC Bias
Telecom
Other
25
28
38
36
46
56
42
40
35
125
850
1700
4500
4000
5500
7500
10000
5000
*T0100-00P
22
150
299
--
--
--
--
1761
880
*T0100-20P
13
90
180
475
--
--
792
1056
528
*T0100-30P
--
117
--
--
--
--
--
1373
687
*T0100-40P
--
--
--
1585
1408
1937
--
--
--
*T0101-10P
--
--
--
--
--
--
--
1045
--
*T0115-00P
--
--
--
938
834
1146
--
--
1042
*T0115-10P
--
--
--
1273
1131
1556
--
--
--
*T0119-00P
28
189
378
--
--
--
1668
2224
1112
*T0119-10P
--
113
--
--
--
--
--
--
667
*T0119-20P
--
129
--
--
--
--
--
--
--
*T0119-40P
--
--
--
2001
1779
2446
--
--
--
*T0120-00P
21
140
279
--
--
--
--
--
821
*T0120-80P
--
186
--
986
876
1205
--
--
--
*T0121-20P
--
--
--
--
1141
--
--
--
--
*T0122-00P
--
172
--
--
--
--
--
--
--
*T0122-30P
--
--
--
1317
1171
1610
--
--
--
*T0130-00P
--
206
--
--
--
--
--
--
--
*T0135-00P
21
142
284
751
667
--
1251
1668
834
*T0135-10P
--
230
--
1216
1081
1486
2027
2703
1351
*T0135-20P
14
96
--
510
--
--
--
1134
--
*T0135-30P
--
--
--
--
--
--
--
3336
--
*T0135-40P
--
--
--
1051
--
--
--
--
1168
*T0135-60P
25
170
340
901
--
--
--
--
1001
*T0137-00P
--
--
--
556
--
--
--
--
--
*T0145-00P
--
--
--
--
1630
--
--
--
--
*T0153-00P
--
--
--
909
--
--
1514
--
--
*T0153-40P
--
--
--
1817
--
2221
--
--
Catalog Parts are designated by AL value.
Part Number
MM
INCHES
wt/k kgs
Ie mm
Ae mm2
Ve mm3
C1 mm-1
MLT mm/Turn
OD
ID
HT
OD
ID
HT
*T0153-60P
3.94
1.78
1.52
0.155
0.070
0.060
0.07
8.097
1.561
12.641
5.186
5.21
*T0153-70P
3.94
1.78
1.78
0.155
0.070
0.070
0.08
8.097
1.821
14.748
4.445
5.72
*T0154-00P
3.94
1.68
1.37
0.155
0.066
0.054
0.07
7.831
1.459
11.429
5.366
5.00
*T0155-00P
3.94
2.24
2.54
0.155
0.088
0.100
0.10
9.196
2.104
19.353
4.370
6.78
*T0155-10P
3.94
2.24
1.27
0.155
0.088
0.050
0.05
9.196
1.052
9.677
8.740
4.24
*T0155-20P
3.94
2.24
2.01
0.155
0.088
0.079
0.08
9.196
1.663
15.289
5.531
5.72
*T0155-80P
3.94
2.24
1.65
0.155
0.088
0.065
0.07
9.196
1.368
12.580
6.723
5.00
*T0157-10P
3.99
2.01
0.99
0.157
0.079
0.039
0.05
8.715
0.944
8.223
9.235
3.96
*T0190-00P
4.83
2.29
2.54
0.190
0.090
0.100
0.18
10.196
3.080
31.401
3.311
7.62
*T0190-10P
4.83
2.29
1.27
0.190
0.090
0.050
0.09
10.196
1.540
15.701
6.621
5.08
*T0195-20P
4.95
1.57
0.76
0.195
0.062
0.030
0.06
8.312
1.155
9.601
7.196
4.90
*T0231-00P
5.84
3.05
1.52
0.230
0.120
0.060
0.14
13.026
2.055
26.775
6.337
5.84
*T0231-10P
5.84
3.05
3.05
0.230
0.120
0.120
0.29
13.026
4.111
53.549
3.169
8.89
*T0231-20P
5.84
3.05
3.18
0.230
0.120
0.125
0.30
13.026
4.282
55.780
3.042
9.14
*T0231-30P
5.84
3.05
2.54
0.230
0.120
0.100
0.24
13.026
3.426
44.624
3.802
7.87
*T0231-50P
5.84
3.05
2.03
0.230
0.120
0.080
0.19
13.026
2.741
35.699
4.753
6.86
*T0231-70P
5.84
3.05
4.29
0.230
0.120
0.169
0.41
13.026
5.790
75.415
2.250
11.38
*T0238-00P
6.05
2.95
3.18
0.238
0.116
0.125
0.34
12.978
4.713
61.163
2.754
9.45
*T0301-00P
7.62
3.18
4.78
0.300
0.125
0.188
0.88
14.970
9.960
149.103
1.503
14.00
*T0315-00P
8.00
3.18
4.78
0.315
0.125
0.188
0.99
15.284
10.736
164.094
1.424
14.38
*T0325-00P
8.26
4.45
4.78
0.325
0.175
0.188
0.89
18.730
8.812
165.042
2.126
13.36
Custom Parts Also Available
Part Number
AL ( nH per turn squared )
Common Mode
DC Bias
Telecom
Other
25
28
38
36
46
56
42
40
35
125
850
1700
4500
4000
5500
7500
10000
5000
*T0153-60P
--
--
--
1090
969
1333
--
--
--
*T0153-70P
--
--
--
1272
--
--
--
2827
--
*T0154-00P
--
--
--
--
--
--
--
--
1171
*T0155-00P
--
244
--
1294
--
--
2157
2876
--
*T0155-10P
18
122
244
--
--
--
--
1438
719
*T0155-20P
--
193
--
--
--
--
--
2272
1136
*T0155-80P
--
159
--
--
--
--
--
--
--
*T0157-10P
--
116
--
--
--
--
--
1361
--
*T0190-00P
--
--
--
--
--
--
2847
3796
--
*T0190-10P
--
161
--
--
--
--
--
--
949
*T0195-20P
--
--
--
786
--
--
--
--
--
*T0231-00P
25
169
337
892
--
--
--
--
991
*T0231-10P
--
337
--
--
--
--
2974
3966
1983
*T0231-20P
--
351
--
--
--
--
3098
4131
2066
*T0231-30P
--
--
--
--
--
--
--
--
1652
*T0231-50P
--
--
--
--
--
--
--
2644
--
*T0231-70P
--
--
--
--
--
--
--
5585
--
*T0238-00P
--
--
--
--
--
--
3423
4564
--
*T0301-00P
--
--
--
--
--
--
6271
8361
4181
*T0315-00P
--
--
--
--
--
--
--
8827
--
*T0325-00P
--
--
--
--
--
--
4434
5912
--
Catalog Parts are designated by AL value.