7741 North Business Park Drive
Tucson, Arizona 85743
Ph: (520) 744-0400 Fax:(520) 744-6155
www.tusonix.com
Web Site: www.tusonix.com
E-mail: sales@tusonix.com
Trimmer
538 Series Trimmer Capacitor
USONIX’s 538 Series featured on this page is miniaturized for
today’s circuitry. All ceramic construction with optically flat inter-
faces provides tuning smoothness not obtainable with compression
type trimmers.
The silver electrodes are intimately bonded to the top surfaces of
the base and rotor. The terminals and other metal parts are nonfer-
rous and silver-plated to provide excellent conductivity and trouble
free soldering.
A variety of capacitance ranges, terminations and mounting provi-
sions makes these popular trimmers ideal for nearly all applications.
T
Dimensions
ADJUSTING SLOT
.032 [0.81] WIDE X .030 [0.76] DEEP
.046
[1.17]
DIA.
.093
[2.36]
.046
[1.17]
Ordering Data
MIL PRF-81
Designation
CV31 TUSONIX
Style 538-054
MIL PRF-81
Designation
CV32 TUSONIX
Style 538-067
Dielectric
Type
Code
Capacitance
Range
(pF)
.200
[5.08]
.585
[14.86]
.035
[0.89]
.125 MAX.
[3.18 MAX.]
.375
[9.53]
.533
[13.54]
.023 [0.58]
.130
[3.30]
INDICATES
ROTOR TERMINAL
.275
6.99]
.012
[0.30]
STATOR TERMINAL
Specify series 538
followed by the three
digit Terminal
Variation you select
from the chart below.
Then list the Dielectric
type code from the
table at the right and
the corresponding
Capacitance Range.
EXAMPLE:
538-002 A 2-8
CV31A080
CV31B110
--
CV31C100
CV31D150
--
CV31A180
--
--
CV31B250
CV31C250
CV31D350
CV31E600
CV32A080
CV32B110
--
CV32C100
CV32D150
--
CV32A180
--
--
CV32B250
CV32C250
CV32D350
CV32E600
A
B
A
C
D
B
A
F
D
B
C
D
F
2.0 to 8
2.5 to 11
3.0 to 10
3.0 to 10
3.0 to 15
3.5 to 14
5.5 to 18
5.0 to 25
5.5 to 25
7.0 to 25
8.0 to 25
9.0 to 35
15.0 to 60
538-000
Variation
Terminal Variation Options
002
.275
[6.99]
Specifications
Working Voltage A,B,C:
006
.300
[7.62]
. . . . .
350Vdc @ 85°C
STATOR TERM.
.150
[3.81]
.040
[1.02]
011
.100
[2.54]
014
.300
[7.62]
.363
[9.22]
0.109 [2.77] DIA.
MOUNTING HOLES
TOP & BOTTOM ADJUST
.300
[7.62]
.040
[1.02]
0.047 [1.19] DIA.
MOUNTING HOLES
200Vdc @ 125°C
Working Voltage D & F:
. . . . .
200Vdc @ 85°C
100Vdc @ 125°C
Dielectric Strength:
. . . .
. 500 Vdc for 1-5 Sec.
Operating Temp. Range:
. . . . .
-55°C to 125°C
Q Factor @ 1 MHz:
. . . . . . . . .
500 Minimum
I.R.: . . . . . . . . . . 10 gigaohms min. at 25
°
C ±5°C
Torque:
. . . . . . . .
1.0-6.0 oz. in.[0.7-4.3 Ncm]
Performance Specification.:
. . . . . . . .
Page 6
Marking:
All units will be marked with the
TUSONIX trademark, capactance
range and dielectric type code.
Example:
T 2-8 A
.145
[3.68]
.405
[10.29]
0.047 [1.19] DIA.
MOUNTING HOLES
.187
[4.75]
.300
[7.62]
.387
[9.83]
0.047 [1.19] DIA.
MOUNTING HOLES
017
026
037
.250
[6.35]
073
.100
[2.54]
.130
[3.30]
.150
[3.81]
074
.068
[1.72]
MIN. I.D.
.100
[2.54]
.363
[9.22]
.040
[1.02]
0.047 [1.19] DIA.
MOUNTING HOLES
.194
[4.93]
.012
[0.30]
.300
[7.62]
.150
[3.81]
.300
[7.62]
0.047 [1.19] DIA.
MOUNTING HOLES
.200
[5.08
.300
[7.62]
0.109 [2.77] DIA.
MOUNTING HOLES
0.047 [1.19] DIA.
MOUNTING HOLES
.400
[10.16]
0.047/1.19 DIA.
MOUNTING HOLES
For dimensions
≤
.125”/3.18mm, tolerance is ±.015/0.38
For dimensions
≥
.126”/3.20mm, tolerance is ±.030/0.76
5
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