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29

550D

Vishay Sprague

Document Number: 40017

Revision 11-Nov-04

For technical questions, contact tantalum@vishay.com

9.

Shelf Test: Capacitors shall withstand a shelf test

for 5000 hours at a temperature of + 85°C, with no

voltage applied.

9.1

Following the shelf test, the leakage current shall meet

the initial requirement; the dissipation factor shall not

exceed 150% of the initial requirement; the

capacitance change shall not exceed ± 5%.

10.

Vibration Tests: Capacitors shall be subjected to

vibration tests in accordance with the following

criteria.

10.1

Capacitors shall be secured for test by means of a rigid

mounting using suitable brackets.

10.2

Low Frequency Vibration: Vibration shall consist of

a simple harmonic motion having an amplitude of 0.03"

[0.76] and a maximum total excursion of 0.06" [1.52], in

a direction perpendicular to the major axis of the

capacitor.

10.2.1 Vibration frequency shall be varied uniformly between

the approximate limits of 10Hz to 55Hz during a period

of approximately one minute, continuously for one and

one-half hours.

10.2.2 A cathode ray oscilloscope or other comparable

means shall be used in determining electrical

intermittency during the final 30 minutes of the test.

The AC voltage applied shall not exceed 2 volts rms.

10.2.3 Electrical tests shall show no evidence of intermittent

contacts, open circuits or short circuits during these

tests.

10.2.4 Following the low frequency vibration test, capacitors

shall meet the original requirements for leakage

current and dissipation factor; capacitance change

shall not exceed ± 5% of the original measured value.

10.3

High Frequency Vibration: Vibration shall consist of

a simple harmonic motion having an amplitude of 0.06"

[1.52] ± 10% maximum total excursion or 20 g peak,

whichever is less.

10.3.1 Vibration Frequency shall be varied logarithmically

from 50Hz to 2000Hz and return to 50Hz during a

cycle period of 20 minutes.

10.3.2 The vibration shall be applied for 4 hours in each of 2

directions, parallel and perpendicular to the major axis

of the capacitors.

10.3.3 Rated DC voltage shall be applied during the

vibration cycling.

10.3.4 A cathode ray oscilloscope or other comparable

means shall be used in determining electrical

intermittency during test. The AC voltage applied

shall not exceed 2 volts rms.

10.3.5 Electrical tests shall show no evidence of intermittent

contacts, open circuits or short circuits during these

tests.

10.3.6 There shall be no mechanical damage to these

capacitors as a result of these tests.

10.3.7 Following the high frequency vibration test, capacitors

shall meet the original limits for capacitance, dissipation

factor and leakage current.

11.

Acceleration Test:

11.1

Capacitors shall be rigidly mounted by means of

suitable brackets.

11.2

Capacitors shall be subjected to a constant acceleration

of 100g for a period of 10 seconds in each of 2 mutually

perpendicular planes.

11.2.1 The direction of motion shall be parallel to and

perpendicular to the cylindrical axis of the capacitors.

11.3

Rated DC voltage shall be applied during acceleration

test.

11.3.1 A cathode ray oscilloscope or other comparable means

shall be used in determining electrical intermittency

during test. The AC voltage applied shall not exceed 2

volts rms.

11.4

Electrical tests shall show no evidence of intermittent

contacts, open circuits or short circuits during these

tests.

11.5

There shall be no mechanical damage to these

capacitors as a result of these tests.

11.6

Following the acceleration test, capacitors shall meet

the original limits for capacitance, dissipation factor and

leakage current.

10.

Shock Test:

12.1

Capacitors shall be rigidly mounted by means of

suitable brackets. The test load shall be distributed

uniformly on the test platform to minimize the effects of

unbalanced loads.

12.1.1 Test equipment shall be adjusted to produce a shock of

100g peak with a duration of 6 mS and a sawtooth

waveform at a velocity change of 9.7 feet/second.

12.2

Capacitors shall be subjected to 3 shocks applied in

each of 3 directions corresponding to the 3

mutually perpendicular axes of the capacitors.

12.3

Rated DC voltage shall be applied to capacitors during

test.

12.3.1 A cathode ray oscilloscope or other comparable means

shall be used in determining electrical intermittency

during test. The AC voltage applied shall not exceed 2

volts rms.

12.4

Electrical tests shall show no evidence of intermittent

contacts, open circuits or short circuits during these

tests.

12.5

There shall be no mechanical damage to these

capacitors as a result of these tests.

12.6

Following the shock test, capacitors shall meet the

original limits for capacitance, dissipation factor and

leakage current.