TEMEX
AIR DIELECTRIC TRIMMER CAPACITORS
AIR DIELECTRIC TRIMMER CAPACITORS
Description
•
Standard
trimmer air capacitors are designed specifically for RF applications, VHF through
microwave, and have become the industry standard of excellence. High Q and temperature stabili-
ty are a result of proper attention to geometry and choice of optimum materials. The heart of this
trimmer is the one piece self-locking constant torque drive mechanism. This mechanism utilizes
transverse slots to create a spring effect between two threaded sections resulting in substantial con-
tact areas which insure uniform torque, high Q and low dynamic tuning noise.
•
Miniature
trimmer air capacitors offer an even further size reduction of the standard air capacitors
coupled with finer tuning resolution and ultra high Q, making them ideal for use in microwave cir-
cuits.
• Both standard and miniature capacitors are available in vertical mounting configurations which save
board space and allow top tuning.
Vertical mount
capacitors are available in single dual and low
inductance leads with upright or inverted tuning.
• Where
High voltage
is a requirement, the AT5300 series air capacitors are an excellent replacement
for comparable range glass capacitors.
Features
•
•
•
•
•
Q’s previously unavailable in trimmer capacitors
Excellent tuning stability and very low dynamic noise
Approximately zero temperature coefficient
Working voltage 250 VDC, test 500 VDC
306° C solder used in assembly
•
•
•
•
Removable hermetic seal
Meets MIL-C-14 409D
French military QPL
ESA-SCC 3010 qualified and
NFC 93.171 approved
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Applications
•
•
•
•
•
RF amplifiers and oscillators
Impedance matching
Crystal trimming
Interstage coupling
Filter tuning
103
TEMEX
AIR DIELECTRIC TRIMMER CAPACITORS
High voltage
Characteristics
Range
∆
Cvs
Rotation
1 to 10 pF
Torque
Rotational life
Insulation
resistance
Contact
resistance
Vibration
Shock
70 to 420 cN.cm
> 800 revolutions
>10
6
MΩ
@ 500 VDC
< 0.01
Ω
60 g 10 - 2000 Hz
1500 g 0.5 ms
Equivalent to
MIL-C-14409D
Measured at
25° C and 50% RH
Low noise
while tuning
MIL-STD-202 E
Method 204 C
MIL-STD-202 E
Method 213 B
Linear over
wide range
Rated 500 VDC Typical breakdown
Voltage
@ sea level
Test 1000 VDC
> 1200 VDC
Measured at
Min. Q @ 100 MHz
> 2000
max. capacitance
Operating
Stable over
-55° C to +125° C
temperature
full range
Thermal shock
Temperature
coefficient
-55° C to +125° C
0 ± 20 ppM/° C
MIL-C-14409D
Measured at 75%
max. capacitance
Technical data
Temex
Part N°
AT5300
AT5301
AT5302
Figure 1
Adj.Slot
A
B
Dimensions (mm)
Capacitance Temperature
range
coefficient
(pF)
(ppM/°C)
1 - 10
0 ± 20
1 - 10
0 ± 20
1 - 10
0 ± 20
Figure 2
Adj.Slot
Q factor
at
100 MHz
> 2000
> 2000
> 2000
Fig.
1
2
3
A
10.7
11.1
10.7
B
7.8
8.3
7.8
Figure 3
C
9.8
9.8
9.8
Thread
5/16-64
5/16-64
5/16-64
A
C.DIA
B
Adj.slot
A
B
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
C.DIA
10
9.5
Lug
1.6
7.9
11.1
Thread
10
C.DIA 3.2 DIA
2.2 DIA
2.8
2.8
Note
Note
Note
Note
1
2
3
4
:
:
:
:
For fixing hole layout tolerances and dimensions, consult
page 122
For Tap sizes and ref. numbers, see
page 118
For special and custom design models, consult
page 117
For panel mounting version (with nut) minimum circuit thickness: 0.8 mm
Q factor versus frequency
Q Factor Vs. frequency
Breakdown voltage versus altitude
1200
1000
800
Breakdown occurs
across insulators
(approx. 30mm Hg.)
2500
2000
1500
Volts DC
600
400
200
0
760
660
560
460
360
260
160
60
1.0 mm
Q
1000
500
250
0
0
100
200 30
400
500
600
700
800
900
1 GHz
mmHg
Freq.(MHz)
104
TEMEX
AIR DIELECTRIC TRIMMER CAPACITORS
Standard
Characteristics
Range
∆
Cvs
Rotation
Voltage
Min. Q @
100 MHz
Operating
temperature
Thermal shock
Temperature
coefficient
See table
See graph
See graph
Torque
Rotational life
Insulation
resistance
Contact
resistance
Self resonant
frequency
Vibration
Shock
70 to 360 cN.cm
> 800 revolutions
>10
6
MΩ
@ 500 VDC
< 0.01
Ω
Average
150 cN.cm
Equivalent to
MIL-C-14409D
Measured at
25° C and 50% RH
Linear over
wide range
Rated 250 VDC Typical breakdown
@ sea level
> 800 VDC
Test 500 VDC
To > 5000
Measured at
See table
max. capacitance
Stable over
-55° C to +125° C
full range
-55° C to +125° C
See table
MIL-C-14409D
Measured at 75%
max. capacitance
Low dynamic
noise
to > 5 GHz
Suitable to «C»
See graph
band applications
MIL-STD-202 E
60 g 10 - 2000 Hz
Method 204 C
MIL-STD-202 E
1500 g 0.5 ms
Method 213 B
Technical data
Temex
Part N°
AT5200
AT5201
AT5202
AT5400
AT5401
AT5402
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Dimensions (mm)
Capacitance Temperature
range
coefficient
(pF)
(ppM/°C)
0.8 - 10
0 ± 15
Fig.
1
2b
3
1
2b
3
1
2b
3
1
2b
3
1
2b
3
1
2a
3
A
7.7
8.0
7.2
7.7
8.0
7.2
7.7
8.0
7.2
12.5
14.7
12.4
12.5
14.7
12.4
17.3
19.4
17.3
B
5.8
5.4
5.8
5.8
5.4
5.8
5.8
5.4
5.8
6.7
4.3
6.7
6.7
4.3
6.7
6.6
4.4
6.6
C
D
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
E
Thread
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
15/64-64
Q factor
at
100 MHz
> 5000
7.2
7.9
> 3000
1 - 14
0 ± 25
7.2
12.0
AT5450
AT5451
AT5452
AT5500
AT5501
AT5502
AT5550
AT5551
AT5552
AT5600
AT5601
AT5602
> 3000
1 - 16
0 ± 50
7.2
12.0
> 1500
> 1000
> 800
1 - 20
1.5 - 25
1 - 30
0 ± 30
0 ± 50
0 ± 30
14.2
14.2
18.8
12.0
12.0
12.0
Breakdown voltage versus altitude
1000
∆
VS rotation
30
20
26
24
22
20
18
16
14
12
10
8
6
4
2
1
0
Without Sealing CAP
Breakdown occurs
across insulator
(approx.30mmHg.)
Without Sealing
CAP
C
pF
5600
5550
5500
5450
5400
5200
800
Volts DC
600
400
200
0
760
660
560
460
360
260
160
60
1.0 mm
0
2
4
6
8
R t ti
10
12
(Nb f T
14
)
16
18
20
22
24
105
TEMEX
AIR DIELECTRIC TRIMMER CAPACITORS
Standard
Figure 1
Figure 2
A
B
a
b
D
E
1
Thread
See Note 3
0.8
5.6
5.6
A
B
D
Lug
0.4
C
See Note 2
Thread
Figure 3
How to order?
•
With standard seal cap
•
With slotted seal cap add suffix S
ex: AT5202
ex: AT5202 S
∆
C versus self-resonant frequency
16
14
12
C
10
8
pF
6
4
2
1
0
5450 MAX C
5400 MAX C
5200 MAX C
Q versus frequency
5000
4000
3000
2000
1500
1000
500
0
5400
5450
5500
5950
5600
5200
q
y
MIN C
0 100 200 300 400 500 600 700 800 900 1GHz
0
1
2
3
Freq.GHz
4
5
5.5
6
Freq.MHz
106
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Note
Note
Note
Note
Note
1:
2:
3:
4:
5:
B. Dimension is increased by 0.8 mm with slotted seal cap.
For fixing hole layout tolerances and dimensions consult
page 122
For Tap sizes and reference numbers see
page 118
For special and custom design models consult
page 117
For panel mounting version (with nut) minimum circuit thickness: 0.8 mm
TEMEX
AIR DIELECTRIC TRIMMER CAPACITORS
Miniature
Characteristics
Range
∆
Cvs
Rotation
Voltage
Min. Q @
100 MHz
Operating
temperature
Thermal shock
Temperature
coefficient
See table
See graph
See graph
Torque
AT5700’s
AT5800’s
Rotational life
Insulation
resistance
Contact
resistance
Self resonant
frequency
Vibration
Shock
30 to 290 cN.cm
22 to 220 cN.cm
> 800 revolutions
>10
6
MΩ
@ 500 VDC
< 0.01
Ω
Equivalent to
MIL-C-14409D
Measured at
25° C and 50% RH
Linear over
wide range
Rated 250 VDC Typical breakdown
@ sea level
Test 500 VDC
> 800 VDC
To > 10000
Measured at
See table
max. capacitance
Stable over
-55° C to +125° C
full range
-55° C to +125° C
See table
MIL-C-14409D
Measured at 75%
max. capacitance
Low dynamic
noise
to > 6 GHz
Suitable to «C»
See graph
band applications
MIL-STD-202 E
60 g 10 - 2000 Hz
Method 204 C
MIL-STD-202 E
1500 g 0.5 ms
Method 213 B
Technical data
Temex
Part N°
AT5700
AT5701
AT5702
AT5750
AT5751
AT5752
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Dimensions (mm)
Capacitance Temperature
range
coefficient
(pF)
(ppM/°C)
0.8 - 6
0 ± 15
Fig.
1
2b
3
1
2b
3
4
2a
3
4
2a
3
A
7.0
7.3
6.9
7.0
7.3
6.9
6.7
7.0
6.7
6.7
7.0
6.7
B
5.6
5.1
5.6
6.3
5.8
6.3
5.9
5.7
5.9
6.8
6.6
6.8
C
D
6.2
6.2
6.2
6.2
6.2
6.2
4.6
4.6
4.6
4.6
4.6
4.6
E
F
G
Thread
10-64
10-64
10-64
10-64
10-64
10-64
.120-80
.120-80
.120-80
.120-80
.120-80
.120-80
Q factor
at
100 MHz
> 10000
6.7
6.3
0.4
> 7500
0.8 - 10
0 ± 50
6.7
6.3
0.4
AT5800
AT5801
AT5802
AT5850
AT5851
AT5852
> 10000
0.35 - 3.5
0 ± 50
6.5
5.4
0.25
> 7500
0.5 - 5
0 ± 50
6.5
5.4
0.25
Breakdown voltage versus altitude
1000
∆
VS rotation
12
10
Without Seal CAP
Breakdown occurs
across insulator
(approx.30mmHg.)
Without Sealing
CAP
5750
800
Volts DC
8
6
4
2
1
0
600
5700
5850
5800
400
200
0
760
660
560
460
360
260
160
60
1.0 mm
0
2
4
6
8
10
12
14
mm Hg
Rotation (Nb of Turns)
107
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