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MIL-PRF-81 Capacitors, Variable, Ceramic Dielectric, General Specification ForThis specification covers the general requirements for ceramic dielectric; variable capacitors intended for operation over a temperature range of -55 degrees C to +85 degrees C, for use in circuits where periodic adjustments are required \(see 6.1\).

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MIL-PRF-81F
TABLE I. Characteristics.
Capacitance change from value at 25°C
Symbol
At -55°C
At +85°C
At +125°C
Minimum
Maximum
Minimum
Maximum
Minimum
Maximum
Percent
Percent
Percent
Percent
Percent
Percent
A
-4.5
+2.0
-2.5
+2.0
-4.2
+3.4
B
-1.0
+3.5
-2.5
-0.5
-4.2
-0.8
C
-1.0
+6.5
-4.0
-1.0
-6.7
-1.7
D
+1.5
+8.2
-5.0
-1.5
-8.5
-2.5
E
+3.0
+14.0
-10.0
-3.0
-15.0
-9.0
G
0.0
+14.0
-8.0
-3.0
-14.0
-5.0
Temperature coefficient -55°C to +85°C
ppm/°C
F
+100
±150
ppm/°C
H
+100
±600
ppm/°C
J
-300
±300
ppm/°C
K
-450
±300
ppm/°C
L
+50
±150
ppm/°C
M
-100
±500
ppm/°C
N
-300
±800
ppm/°C
P
-400
±500
ppm/°C
Q
-1500
±900
2



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