135D
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Revision: 01-Mar-2019 9Document Number: 40024
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10. Ripple Life Test at +85 °C: capacitors shall be tested
in accordance with Military Specification
MIL-PRF-39006 except that:
a) Operation conditions: this test shall be run at a
frequency of 40 kHz ± 2 kHz sinusoidal and at the
RMS ripple current levels specified in the Standard
Ratings and Extended Ratings table.
b) Applied DC voltage shall be reduced so that the
peak AC voltage plus DC voltage shall not exceed
the rated voltage of the capacitor in either the
forward or reverse direction.
10.1 When tested as specified above, capacitors shall meet
the following requirements:
a) The DC leakage current at +25 °C and at +85 °C
shall not exceed the original requirements.
b) The capacitance shall not change more than ± 15 %
from the initial measured value.
c) The dissipation factor shall not exceed the original
requirements.
d) Visual examination: there shall be no damage,
obliteration of marking or leakage of electrolyte.
11. Reverse Voltage Test: capacitors shall withstand a
reverse voltage of 3 VDC at +85 °C or 2 V at +125 °C
for 2000 h. The capacitors shall then be restabilized for
24 h at 85 °C with rated DC forward potential applied
through a 1000 resistor.
11.1 Following the reverse voltage test, the DC leakage
current shall not be in excess of the original
requirement; the equivalent series resistance shall not
exceed 200 % of the initial requirement; the
capacitance value shall not be less than 90 % of the
initial measurement.
12. Mechanical Shock Test: capacitors shall withstand a
shock of 500 g when tested in accordance with
method 213 of MIL-STD-202, test condition D.
12.1 Following the mechanical shock test, capacitors shall
be examined for evidence of mechanical damage and
leakage of electrolyte. Capacitance, equivalent series
resistance, and DC leakage current shall meet the
initial requirements.
13. High Frequency Vibration: capacitors shall withstand
vibration from 10 Hz to 2000 Hz at 80 g without internal
damage when tested in accordance with
MIL-STD-202, method 204, test condition H. Electrical
measurements made while under these conditions
shall show no intermittent contacts, open circuits or
short circuits.
13.1 Capacitors shall be securely fastened by means of
suitable component clips or brackets.
14. Random Vibration: capacitors shall withstand
random vibration at all levels up to 51 g RMS overall
when tested in accordance with MIL-STD-202,
method 214, test condition II K. The test shall be
conducted for 1.5 h in each of three mutually
perpendicular directions.
14.1 Electrical measurements made during the test shall
show no intermittent contacts, open circuits or short
circuits.
15. Pull Test: leads shall withstand a tensile stress of 3
lbs. (1.4 kg) for 30 s applied axially in accordance with
MIL-STD-202, method 211, test condition A.
16. Lead Bend Test: leads shall meet the bend test
specified in Military Standard MIL-STD-202, method
211 A, condition C except that the number of bends
shall be 4.
17. Moisture Resistance: capacitors shall withstand the
moisture resistance cycling test specified in Military
Standard MIL-STD-202, method 106, without
departure from the original limits of capacitance,
equivalent series resistance and DC leakage current.
18. Reduced Pressure: capacitors shall be stabilized at a
reduced atmospheric pressure of 0.82" [20.83 mm] of
mercury for a period of 5 min. Rated DC voltage shall
be applied for 1 min. Capacitors shall not flash over
nor shall end seals be damaged by this nor should the
capacitors be electrically effected insofar as
capacitance, equivalent series resistance or leakage
current is concerned.
19. Seal Test:
19.1 Capacitors shall be tested in accordance with
MIL-STD-202, method 112, test condition C,
procedure IIIa. Specimens shall be pressurized at 4
atmospheres (gage) for 4 h.
20. Thermal Shock: capacitors shall be subjected to 300
cycles of thermal shock in accordance with Military
specification MIL-PRF-39006.
20.1 Following the thermal shock test, capacitor leakage
current shall not exceed twice the initial requirement.
21. Marking: capacitors shall be marked with Vishay
identification; capacitors type (135D); rated
capacitance and tolerance (the tolerance shall be
coded, using the list shown in How to Order); rated DC
working voltage at +85 °C; the standard EIA date
code of manufacture.
21.1 Polarity shall be indicated by plus signs (+) adjacent to
the positive terminal.