148 Datasheet, PDF (1/1 Pages) Vishay Siliconix – 1/2 (12.7 mm) Conductive Plastic and Cermet Potentiometers

Document 111
Tunable RF Inductors – 148 Series
With an overall height of only 0.300″, these tunable
coils are ideal for applications where low-profile circuit
boards are essential.
The windings are precision molded in plastic to guaran-
tee a constant winding pitch and a consistent relation-
ship to the printed circuit board. Tuning is done by
means of a threaded Carbonyl J core.
Coilcraft Designer’s Kit M304 contains three samples
each of the values shown plus 20 values from the
132 Series of low-profile, high Q fixed inductors. To order,
contact Coilcraft or visit http://order.coilcraft.com.
Part
number¹
148-01J12L
148-02J12L
148-03J12L
148-04J12L
148-05J12L
148-06J12L
148-07J12L
148-08J12L
148-09J12L
148-10J12L
148-11J12L
148-12J12L
148-13J12L
Color
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
Brown
Red
Orange
Turns
1½
2½
3½
4½
5½
6½
7½
8½
9½
10½
11½
12½
13½
no core
35
44
56
74
92
114
142
168
198
237
276
315
344
Inductance (nH)²
min³
nom
38
39
46
52
60
73
77
101
96
130
120
170
154
222
176
262
208
310
250
375
290
435
338
500
362
540
max³
40
58
86
125
164
220
290
346
410
500
580
666
710
Q min⁴
at L nom
88 @ 50 MHz
96 @ 50 MHz
106 @ 50 MHz
112 @ 50 MHz
112 @ 50 MHz
112 @ 50 MHz
110 @ 50 MHz
106 @ 25 MHz
104 @ 25 MHz
90 @ 25 MHz
84 @ 25 MHz
66 @ 25 MHz
64 @ 25 MHz
No core SRF
min (MHz)
3200
1560
1200
980
820
720
620
570
490
450
410
350
320
1. To order fixed inductance parts without cores, eliminate the “J12”, e.g.
148-13L.
2. Inductance and Q readings taken on Agilent/HP 4342-A Q meter with 16
AWG tinned copper 1/2″ long soldered along leads and bent at 90° 1/4″
down from standoffs.
3. L min measured with core halfway out top of form. L max measured with
core centered in the windings.
4. Inductance values at 50 MHz calculated from C_p readings. Inductance
values at 25 MHz read at standard Q meter frequency (blue line).
5. Core material: Carbonyl J. Core length: 3/8″.
6. Operating temperature range -40°C to +85°C.
7. Electrical specifications at 25°C.
0.275
6,99
max
0.300 _max
7,62
0.750 ±0.015
19,05 ±0,38
0.310 _typ
7,87
0.190
4,83
typ
0.250
6,35
±0.030
±0,76
typ
0.198 ±0.010
5,03 ±0,25
22 AWG
Weight:
0.7 – 1.2 g
Terminations: Tin-silver over copper
0.360 ±0.010
9,14 ±0,25
Specifications subject to change without notice.
Please check our website for latest information.
Document 111 Revised 04/27/05
© Coilcraft, Inc. 2007