MIL-DTL-3965H
TABLE X. Temperature and measurements for stability tests
at low and high temperatures.
Test
Step
Temperature
Measurement
paragraph
4.7.5
DC leakage
+25°C
1
4.7.6
Capacitance
4.7.7
Dissipation factor
-55°C +0°C, -3°C
2
Impedance
4.7.17.1
Capacitance
4.7.6
4.7.5
DC leakage
+25°C
4.7.6
Capacitance
3
4.7.7
Dissipation factor
DC leakage
4.7.5
+85°C +6°C, -0°C
4
Capacitance
4.7.6
Dissipation factor
4.7.7
DC leakage 1/
4.7.5
+125°C +7°C, -0°C
Capacitance
5
4.7.6
Dissipation factor
4.7.7
4.7.5
DC leakage
+25°C
4.7.6
Capacitance
6
4.7.7
Dissipation factor
1/ During this measurement, derated voltage (see 3.1) shall be applied.
4.7.18 Life at 85°C (see 3.22).
4.7.18.1 2,000-hour (qualification inspection) (see 3.22.1). Capacitors shall be tested in accordance with method
108 of MIL-STD-202. The following details and exceptions shall apply:
a.
Distance of temperature measurements from specimens: Not applicable.
b.
Method of mounting: Wire-lead terminal capacitors shall be mounted by their terminals; all other capacitors
shall be mounted by normal mounting means.
Test temperature and tolerance: +85°C +6°C, -0°C.
c.
d.
Operating conditions: DC rated voltage (see 3.1) shall be applied gradually (not to exceed 5 minutes either
by a slow build-up of the voltage or through a resistor which shall be shorted out within 5 minutes). Voltage
shall be applied continuously except for measurement periods. The impedance of the voltage source, as
seen from the terminals of each capacitor, shall not exceed 10 ohms. Storage batteries (or an electronic
power supply) capable of supplying at least 100 milliamperes when a capacitor is shorted out shall be used.
For nonpolarized capacitors, the voltage shall be reversed every 125 ±10 hours.
e.
Test condition: F (2,000) +72 -0 hours).
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