US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 108-1
Document 108-1 Revised 09/18/08
10 mm Tunable Coils
–
142,
143,
144
These Coilcraft variable inductors are precision molded in
plastic to ensure constant winding pitch and a consistent
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 ordered without cores for use as
fixed inductors.
Coilcraft Designer’s Kit M302 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
With Shield Can
3TOOLSIN1
TUNING WRENCH
TRITUNER
SEE INDEX
Terminations: Series 142 and 143 leads: Tin-silver over copper
Series 144 leads: Matte tin over copper
Shield can tabs: Tin-silver over nickel over brass
0.750
19,05
0.531
13,49
0.157 ±0.010
3,99±0,25
0.060 ±0.010
1,52 ±0,25
max
max
Ta blength
0.197
5,00 dia
0.411
10,44
Start
Finish
0.375
9,53 Ta bcenters
0.704 ±0.020
17,88 ±0,51
0.138 ±0.040
3,5 ±1,02
0.025 ±0.002
0,635 ±0,05 dia
0.380
±0.005
9,65 ±0,13
square
sq max
Start
Finish
0.276 ±0.007
7,01 ±0,18
0.276 ±0.007
7,01 ±0,18
Recommended
BoardLayout
C
L
C
L
0.138
3,505
0.138
3,505
0.1875
4,76
(2)
0.045
1,143
0.197
5,00
(optional, fortuning
through the board)
0.080
2,03
(for shield
can tabs)
0.470 ±0.020
11,94 ±0,51 (142 Series only)
(142 Series only)
Unshielded With shield can
Weight: 142 series 1.39 – 1.82 g 1.64 – 2.16 g
143 series 1.75 – 2.40 g 2.85 – 3.54 g
144 series 1.22 – 1.74 g 2.35 – 2.91 g
Packaging: 50 per tube 50 per tube
Resistance to soldering heat: Wave solder only. Recommended maximum
board surface temperature of 168°C (334°F) for no more than three seconds.
Pre-heating is recommended to minimize time over the solder nozzle.
Dimensions are in inches
mm
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 108-2
No core DCR
Part No core L2 L min3 L nom L max SRF min max Irms5
number1 Color Turns nom (nH) (nH) (nH) (nH) Q min4 (MHz) (mOhm) (A)
144-01J12L Brown 1½ 53 56 59 62 140 1800 7.4 11.0
144-02J12L Red 2½ 75 79 88 98 145 1150 8.6 10.0
144-03J12L Orange 3½ 99 104 123 142 147 900 9.7 9.6
144-04J12L Yellow 4½ 126 132 164 195 150 765 10.9 9.0
144-05J12L Green 5½ 154 162 207 252 154 670 12.1 8.6
144-06J12L Blue 6½ 182 193 250 306 154 610 13.6 8.1
144-07J12L Violet 7½ 214 240 298 356 158 525 14.7 7.8
144-08J12L Gray 8½ 245 283 344 405 160 465 15.9 7.5
144-09J12L White 9½ 274 328 387 446 162 420 17.1 7.2
144-10J12L Black 10½ 307 391 442 493 162 390 18.5 7.0
142-01J08L Brown 1½ 63 63 65 68 115 980 7.4 13.4
142-02J08L Red 2½ 92 93 100 107 118 600 8.4 12.5
142-03J08L Orange 3½ 127 133 145 157 120 470 9.6 11.8
142-04J08L Yellow 4½ 166 174 196 218 125 420 10.8 11.1
142-05J08L Green 5½ 212 226 256 287 122 370 11.9 10.5
142-06J08L Blue 6½ 258 275 315 355 112 340 13.2 10.0
142-07J08L Violet 7½ 307 330 378 427 112 310 14.5 9.6
142-08J08L Gray 8½ 357 396 450 504 106 290 15.7 9.2
142-09J08L White 9½ 412 473 520 567 110 270 16.9 8.9
142-10J08L Black 10½ 464 550 592 635 104 260 18.0 8.6
143-09J12L White 9½ 385 404 550 693 86 280 16.7 7.3
143-10J12L Black 10½ 438 460 624 788 90 270 17.9 7.1
143-11J12L Brown 11½ 490 515 708 900 78 260 19.2 6.8
143-12J12L Red 12½ 545 578 764 950 84 250 20.5 6.6
143-13J12L Orange 13½ 600 673 845 1020 84 245 21.7 6.4
143-14J12L Yellow 14½ 645 726 908 1090 82 240 22.8 6.3
143-15J12L Green 15½ 692 803 978 1150 90 230 23.9 6.1
143-16J12L Blue 16½ 765 891 1080 1270 74 225 25.2 6.0
143-17J12L Violet 17½ 830 1010 1180 1340 74 215 26.4 5.8
143-18J12L Gray 18½ 895 1100 1250 1400 92 195 27.6 5.7
143-19J12L White 19½ 910 1200 1320 1440 98 190 28.9 5.6
143-20J12L Black 20½ 960 1300 1400 1500 92 185 30.0 5.5
No core DCR
Part No core L2 L min3 L nom L max SRF min max Irms5
number1 Color Turns nom (nH) (nH) (nH) (nH) Q min4 (MHz) (mOhm) (A)
144-01J12SL Brown 1½ 50 52 53 54 97 2200 7.4 11.0
144-02J12SL Red 2½ 67 70 74 78 98 1200 8.6 10.0
144-03J12SL Orange 3½ 88 92 99 106 98 920 9.7 9.6
144-04J12SL Yellow 4½ 106 111 122 133 100 790 10.9 9.0
144-05J12SL Green 5½ 126 132 149 165 101 685 12.1 8.6
144-06J12SL Blue 6½ 147 154 175 196 106 625 13.6 8.1
144-07J12SL Violet 7½ 168 176 200 223 104 530 14.7 7.8
144-08J12SL Gray 8½ 190 202 226 250 108 480 15.9 7.5
144-09J12SL White 9½ 210 239 256 274 108 435 17.1 7.2
144-10J12SL Black 10½ 232 270 282 295 106 420 18.5 7.0
142-01J08SL Brown 1½ 58 58 59.5 61 82 1230 7.4 13.4
142-02J08SL Red 2½ 81 84 86 89 83 650 8.4 12.5
142-03J08SL Orange 3½ 110 115 120 121 85 550 9.6 11.8
142-04J08SL Yellow 4½ 140 147 156 160 88 460 10.8 11.1
142-05J08SL Green 5½ 174 182 197 205 94 410 11.9 10.5
142-06J08SL Blue 6½ 210 220 240 248 94 370 13.2 10.0
142-07J08SL Violet 7½ 247 259 280 290 90 330 14.5 9.6
142-08J08SL Gray 8½ 284 299 322 337 86 320 15.7 9.2
142-09J08SL White 9½ 319 338 363 377 88 310 16.9 8.9
142-10J08SL Black 10½ 357 382 410 422 82 290 18.0 8.6
143-09J12SL White 9½ 300 315 369 423 80 303 16.7 7.3
143-10J12SL Black 10½ 338 355 416 477 82 290 17.9 7.1
143-11J12SL Brown 11½ 377 396 468 540 78 270 19.2 6.8
143-12J12SL Red 12½ 412 433 509 585 80 265 20.5 6.6
143-13J12SL Orange 13½ 452 475 556 637 80 265 21.7 6.4
143-14J12SL Yellow 14½ 490 515 604 693 78 260 22.8 6.3
143-15J12SL Green 15½ 522 583 660 738 80 250 23.9 6.1
143-16J12SL Blue 16½ 575 638 720 801 76 245 25.2 6.0
143-17J12SL Violet 17½ 612 693 770 846 76 240 26.4 5.8
143-18J12SL Gray 18½ 650 754 814 874 82 215 27.6 5.7
143-19J12SL White 19½ 675 792 846 900 80 210 28.9 5.6
143-20J12SL Black 20½ 715 847 896 945 74 200 30.0 5.5
1. To order fixed inductance parts
without cores, eliminate the “J08”
or “J12”, e.g. 144-01L or 144-01SL.
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.
Unshielded
Shielded
Document 108-2 Revised 09/18/08
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Coilcraft:
142-09J08L 143-19J12L 143-20J12L 144-05J12L 142-08J08L 142-10J08SL 142-02J08L 143-12J12L 144-
10J12L 142-02J08SL 144-02J12L 143-17J12L 143-09J12L 143-11J12SL 144-03J12SL 142-05J08L 143-14J12L
142-04J08L 144-02J12SL 143-11J12L 143-15J12SL 142-07J08L 143-12J12SL 144-01J12SL 144-04J12SL 143-
20J12SL 143-13J12L 142-09J08SL 143-18J12SL 142-03J08L 143-09J12SL 143-19J12SL 144-08J12L 144-
05J12SL 143-16J12SL 144-06J12L 142-03J08SL 144-06J12SL 144-01J12L 142-07J08SL 144-07J12SL 142-
08J08SL 144-03J12L 142-10J08L 144-09J12SL 143-13J12SL 143-16J12L 142-04J08SL 142-05J08SL 143-
18J12L 143-14J12SL 144-10J12SL 142-06J08L 144-04J12L 142-01J08L 142-06J08SL 143-10J12SL 144-07J12L
143-17J12SL 143-15J12L 144-08J12SL 143-10J12L 144-09J12L 142-01J08SL
