Document Number: 40017

Revision 11-Nov-04

www.vishay.com

30

550D

Vishay Sprague

For technical questions, contact tantalum@vishay.com

13.

Moisture Resistance:

13.1

Capacitors shall be subjected to temperature cycling

at 90% to 98% relative humidity, in a test chamber

constructed of non-reactive materials

(non-resiniferous and containing no formaldehyde or

phenol). Steam or distilled, demineralized or deionized

water having a pH value between 6.0 and 7.2 at + 23°C

shall be used to obtain the required humidity. No rust,

corrosive contaminants or dripping condensate shall

be imposed on test specimens.

13.1.1 Capacitors shall be mounted by their normal mounting

means in a normal mounting position and placed in a

test chamber so that uniform and thorough exposure

is obtained.

13.1.2 No conditioning or initial measurements will be

performed prior to temperature cycling. Polarization

and load voltages are not applicable.

13.1.3 Capacitors shall be subjected to temperature cycling

from + 25°C to + 65°C to + 25°C (+ 10°C, -2°C) over

a period of 8 hours, at 90% to 98% relative humidity,

for 20 cycles.

13.1.4 Temperature cycling shall be stopped after an even

number of cycles 5 times during the first 18 cycles,

and the capacitor shall be alloweed to stabilize at high

humidity for 1 to 4 hours.

13.1.5 After stabilization, capacitors shall be removed from

the humidity chamber and shall be conditioned for 3

hours at - 10°C ± 2°C.

13.1.6 After cold conditioning, capacitors shall be subjected

to vibration cycling consisting of a simple harmonic

vibration having an amplitude of 0.03” [0.76] and a

maximum total excursion of 0.06” [1.52] varied uniformly

from 10Hz to 55Hz to 10Hz over a period of 1 minute,

for 15 cycles.

13.1.7 Capacitors shall then be returned to temperature/

humidity cycling.

13.2

After completion of temperature cycling, capacitors

shall be removed from the test chamber and stabilized

at room temperature for 2 to 6 hours.

13.3

Capacitors shall show no evidence of harmful or

extensive corrosion, obliteration or marking or other

visible damage.

13.4

Following the moisture resistance test, capacitors shall

meet the original limits for capacitance, dissipation

factor and leakage current.

14.

Insulating Sleeves:

14.1

Capacitors with insulating sleeves shall withstand a

2000 volt DC potential applied for 1 minute between

the case and a metal ‘V’ block in intimate contact with

the insulating sleeve.

14.2

Capacitors with insulating sleeves shall have the

insulation resistance measured between the case and

a metal ‘V’ block in intimate contact with the insulating

sleeve. The insulation resistance shall be at least

1000 megohms.

15.

Thermal Shock And Immersion Cycling:

15.1

Capacitors shall be conditioned prior to temperature

cycling for 15 minutes at + 25°C, at less than 50%

relative humidity and a barometric pressure at 28 to 31

inches.

15.2

Capacitors shall be subjected to thermal shock in a

cycle of exposure to ambient air at - 65°C (+ 0°C, - 5°C)

for 30 minutes, then, + 25°C (+ 10°C, - 5°C) for 5

minutes, then + 125°C (+ 3°C, - 0°C) for 30 minutes, then

+ 25°C (+ 10°C, - 5°C) for 5 minutes, for 5 cycles.

15.3

Between 4 and 24 hours after temperature cycling,

capacitors shall be subjected to immersion in a bath of

fresh tap water with the non-corrosive dye

Rhodamine B added, at + 65°C (+ 5°C, - 0°C) for 15

minutes, then, within 3 seconds, immersed in a

saturated solution of sodium chloride and water with

Rhodamine B added, at a temperature of + 25°C

(+ 10°C, - 5°C) for 15 minutes, for 2 cycles.

15.3.1 Capacitors shall be thoroughly rinsed and wiped or

air-blasted dry immediately upon removal from

immersion cycling.

15.4

Capacitors shall show no evidence of harmful or

extensive corrosion, obliteration of marking or other

visable damage.

15.5

Following the thermal shock immersion cycling test,

capacitors shall meet the original requirements for

leakage current and dissipation factor;

capacitance change shall not exceed ± 5% of the

original measured value.

15.6

Capacitors shall be opened and examined. There

shall be no evidence of dye penatration.

16.

Reduced Pressure Test:

16.1

Capacitors shall be stabilized at a reduced pressure of

0.315” [8.0] of mercury, equivalent to an altitude of

100,000 feet [30,480 meters], for a period of 5 minutes.

16.2

Rated DC voltage shall be applied for 1 minute.

16.3

Capacitors shall not flash over nor shall end seals be

damaged.

16.4

Following the reduced pressure test, the capacitance,

equivalent series resistance and leakage current shall

meet the original requirements.

17.

Lead Pull Test: Leads shall withstand a tensile stress

of 3 pounds (1.4 kilograms) applied in any direction for

30 seconds.

17.

or (2); the type number 550D; rated capacitance and

tolerance, rated DC working voltage and the standard

EIA date code.

18.1

Capacitors shall be marked on one end with a plus

sign (+) to identify the positive terminal.

18.2

higher working voltages than those ordered, where

the physical size of the higher voltage units is identical

to that of the units ordered.