Document 108-1
10 mm Tunable Coils–142, 143, 144 Series
These Coilcraft variable inductors are precision molded
in plastic to ensure constant winding pitch and a consis-
tent relationship to the printed circuit board.
Extremely economical, even in small quantities, the coils
come in standard inductance values from 0.05 µH to
1.5 µH. 144 Series parts are also available with a tap to
meet specific requirements.
Tuning is done by means of a threaded powdered iron core
with a hex socket for easy, positive adjustment. Plated
brass shield cans with solderable tabs are optional.
These parts can be odered without cores for use as fixed
inductors.
Coilcraft
Designer’s Kit M102
contains samples of all
standard 10 mm and 7 mm tunable inductors. To order,
contact Coilcraft or visit
http://order.coilcraft.com
to
purchase on-line.
Unshielded Styles
0.380 ±0.005 square
9,65 ±0,13
0.704 (0.470*) ±0.020
17,88 (11,94*) ±0,51
0.138 ±0.040
3,5 ±1,02
0.276 ±0.007
7,01 ±0,18
TRITUNER
3 TOOLS IN 1
SEE INDEX
TUNING WRENCH
Start
0.276 ±0.007
7,01 ±0,18
Finish
0.025 ±0.002
dia
0,635 ±0,05
With Shield Can
0.411
max
10,44
0.750 (0.531*) max
19,05 (13,49*)
0.060 ±0.010
1,52 ±0,25
Start
Recommended
Board Layout
0.375
Tab centers
9,53
0.197 (optional, for tuning
5,00 through the board)
0.080 (for shield
2,03 can tabs)
0.138
3,505
0.138
3,505
0.197
dia
5,00
Finish
0.157 ±0.010
3,99 ± 0,25
Tab length
*142 Series only
0.045 (2)
1,143
0.1875
4,76
C
L
C
L
Specifications subject to change without notice.
Please check our website for latest information.
Document 108-1
Revised 08/15/05
© Coilcraft, Inc. 2005
Document 108-2
Unshielded
Part
number
1
144-01J12
144-02J12
144-03J12
144-04J12
144-05J12
144-06J12
144-07J12
144-08J12
144-09J12
144-10J12
142-01J08
142-02J08
142-03J08
142-04J08
142-05J08
142-06J08
142-07J08
142-08J08
142-09J08
142-10J08
143-09J12
143-10J12
143-11J12
143-12J12
143-13J12
143-14J12
143-15J12
143-16J12
143-17J12
143-18J12
143-19J12
143-20J12
Color
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
White
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
Turns
1½
2½
3½
4½
5½
6½
7½
8½
9½
10½
1½
2½
3½
4½
5½
6½
7½
8½
9½
10½
9½
10½
11½
12½
13½
14½
15½
16½
17½
18½
19½
20½
No core L
2
ref (µH)
0.053
0.075
0.099
0.126
0.154
0.182
0.214
0.245
0.274
0.307
0.063
0.092
0.127
0.166
0.212
0.258
0.307
0.357
0.412
0.464
0.385
0.438
0.490
0.545
0.600
0.645
0.692
0.765
0.830
0.895
0.910
0.960
L min
3
(µH)
0.056
0.079
0.104
0.132
0.162
0.193
0.240
0.283
0.328
0.391
0.063
0.093
0.133
0.174
0.226
0.275
0.330
0.396
0.473
0.550
0.404
0.460
0.515
0.578
0.673
0.726
0.803
0.891
1.01
1.10
1.20
1.30
L nom
(µH)
0.059
0.088
0.123
0.164
0.207
0.250
0.298
0.344
0.387
0.442
0.065
0.100
0.145
0.196
0.256
0.315
0.378
0.450
0.520
0.592
0.550
0.624
0.708
0.764
0.845
0.908
0.978
1.08
1.18
1.25
1.32
1.40
L max
(µH)
0.062
0.098
0.142
0.195
0.252
0.306
0.356
0.405
0.446
0.493
0.068
0.107
0.157
0.218
0.287
0.355
0.427
0.504
0.567
0.635
0.693
0.788
0.900
0.950
1.02
1.09
1.15
1.27
1.34
1.40
1.44
1.50
Q min
4
140
145
147
150
154
154
158
160
162
162
115
118
120
125
122
112
112
106
110
104
86
90
78
84
84
82
90
74
74
92
98
92
No core
DCR
SRF min
max
(MHz) (mOhm)
1800
1150
900
765
670
610
525
465
420
390
980
600
470
420
370
340
310
290
270
260
280
270
260
250
245
240
230
225
215
195
190
185
7.4
8.6
9.7
10.9
12.1
13.6
14.7
15.9
17.1
18.5
7.4
8.4
9.6
10.8
11.9
13.2
14.5
15.7
16.9
18.0
16.7
17.9
19.2
20.5
21.7
22.8
23.9
25.2
26.4
27.6
28.9
30.0
Irms
5
(A)
11.0
10.0
9.6
9.0
8.6
8.1
7.8
7.5
7.2
7.0
13.4
12.5
11.8
11.1
10.5
10.0
9.6
9.2
8.9
8.6
7.3
7.1
6.8
6.6
6.4
6.3
6.1
6.0
5.8
5.7
5.6
5.5
Shielded
Part
number
1
144-01J12S
144-02J12S
144-03J12S
144-04J12S
144-05J12S
144-06J12S
144-07J12S
144-08J12S
144-09J12S
144-10J12S
142-01J08S
142-02J08S
142-03J08S
142-04J08S
142-05J08S
142-06J08S
142-07J08S
142-08J08S
142-09J08S
142-10J08S
143-09J12S
143-10J12S
143-11J12S
143-12J12S
143-13J12S
143-14J12S
143-15J12S
143-16J12S
143-17J12S
143-18J12S
143-19J12S
143-20J12S
Color
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
White
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
Turns
1½
2½
3½
4½
5½
6½
7½
8½
9½
10½
1½
2½
3½
4½
5½
6½
7½
8½
9½
10½
9½
10½
11½
12½
13½
14½
15½
16½
17½
18½
19½
20½
No core L
2
ref (µH)
0.050
0.067
0.088
0.106
0.126
0.147
0.168
0.190
0.210
0.232
0.058
0.081
0.110
0.140
0.174
0.210
0.247
0.284
0.319
0.357
0.300
0.338
0.377
0.412
0.452
0.490
0.522
0.575
0.612
0.650
0.675
0.715
L min
3
(µH)
0.052
0.070
0.092
0.111
0.132
0.154
0.176
0.202
0.239
0.270
0.058
0.084
0.115
0.147
0.182
0.220
0.259
0.299
0.338
0.382
0.315
0.355
0.396
0.433
0.475
0.515
0.583
0.638
0.693
0.754
0.792
0.847
L nom
(µH)
0.053
0.074
0.099
0.122
0.149
0.175
0.200
0.226
0.256
0.282
0.0595
0.086
0.120
0.156
0.197
0.240
0.280
0.322
0.363
0.410
0.369
0.416
0.468
0.509
0.556
0.604
0.660
0.720
0.770
0.814
0.846
0.896
L max
(µH)
0.054
0.078
0.106
0.133
0.165
0.196
0.223
0.250
0.274
0.295
0.061
0.089
0.121
0.160
0.205
0.248
0.290
0.337
0.377
0.422
0.423
0.477
0.540
0.585
0.637
0.693
0.738
0.801
0.846
0.874
0.900
0.945
Q min
4
97
98
98
100
101
106
104
108
108
106
82
83
85
88
94
94
90
86
88
82
80
82
78
80
80
78
80
76
76
82
80
74
No core
DCR
SRF min
max
(MHz) (mOhm)
2200
1200
920
790
685
625
530
480
435
420
1230
650
550
460
410
370
330
320
310
290
303
290
270
265
265
260
250
245
240
215
210
200
7.4
8.6
9.7
10.9
12.1
13.6
14.7
15.9
17.1
18.5
7.4
8.4
9.6
10.8
11.9
13.2
14.5
15.7
16.9
18.0
16.7
17.9
19.2
20.5
21.7
22.8
23.9
25.2
26.4
27.6
28.9
30.0
Irms
5
(A)
11.0
10.0
9.6
9.0
8.6
8.1
7.8
7.5
7.2
7.0
13.4
12.5
11.8
11.1
10.5
10.0
9.6
9.2
8.9
8.6
7.3
7.1
6.8
6.6
6.4
6.3
6.1
6.0
5.8
5.7
5.6
5.5
1. To order fixed inductance parts
without cores, eliminate the “J08” or
“J12”, e.g. 144-01 or 144-01S.
2. Inductance and Q readings taken
on Boonton 260-A Q meter with
16 AWG tinned copper
1
/
2
″
long
soldered along leads and bent at
90°
1
/
4
″
down from standoffs.
All inductance values greater
than 0.1 µH read at recommended
Q meter frequency; those below
0.1 µH calculated from readings
taken at 50 MHz.
3. L min measured with core halfway
out top of form.
4. Q min measured at L nom at
40 MHz.
5. Average current for a 40°C rise
above 25°C ambient.
6. Core material: Carbonyl J
Core length: 142 Series -
1
/
4
″
143, 144 Series -
3
/
8
″
7. Taps available on 144 series parts
at
1
/
8
,
3
/
8
,
5
/
8
and
7
/
8
turn increments.
8. Operating temperature range
−40°C
to +85°C.
9. Electrical specifications at 25°C.
Specifications subject to change without notice.
Please check our website for latest information.
Document 108-2
Revised 01/03/05
© Coilcraft, Inc. 2005
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