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© Coilcraft Inc. 2013

This product may not be used in medical or high

risk applications without prior Coilcraft approval.

Specification subject to change without notice.

Please check web site for latest information.

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

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

Tab length

0.197

5,00 dia

0.411

10,44

Start

Finish

0.375

9,53 Tab centers

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

CL

CL

0.138

3,505

0.138

3,505

0.1875

4,76

(2)

0.045

1,143

0.197

5,00

(optional, for tuning

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