135D

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Revision: 09-Apr-13

8

Document Number: 40024

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

6.2 The dissipation factor may be calculated from the

equivalent series resistance and capacitance values as

shown:

where:

DF = Dissipation Factor in %

R = ESR in



C = Capacitance in μF

f = Frequency in Hz

At 120 Hz, the above equation becomes:



For example, percent dissipation factor of a 30 μF, 6 V

capacitor, which has a maximum ESR of 4.0

 at

+ 25 °C and 120 Hz, would be calculated as shown:



7.

Leakage Current: Measurements shall be made at the

applicable rated working voltage at + 25 °C ± 5 °C

through application of a steady source of power, such

as a regulated power supply. A 1000

 resistor to limit

the charging current shall be conected in series with

each capacitor under test. Rated working voltage shall

be applied to capacitors for 5 minutes before making

leakage current measurements.

7.1 The maximum leakage current for any capacitor shall

not exceed the maximum value in mA listed in the

Standard Ratings and Extended Ratings table for each

capacitor.

Note

• Leakage current varies with applied voltage. See graph next

column for the appropriate adjustment factor

8.

Low Temperature Impedance: The impedance of any

capacitor at - 55 °C at 120 Hz, shall not exceed the

values given in the Standard Ratings and Extended

Ratings tables.

9.

Life Test: Capacitors are capable of withstanding a

2000 h life test at a temperature of + 85 °C or + 125 °C

at the applicable rated DC working voltage.

9.1 Following the life test, the capacitors shall be returned

to 25 °C ± 5 °C. The leakage current, measured at the

+ 85 °C rated voltage, shall not be in excess of the

original requirement; the capacitance value shall not

exceed

150

%

of

the

initial

requirement;

the

capacitance value shall not change more than 10 %

from the initial measurement.

9.3 Capacitors are capable of withstanding life test at the

following conditions:

9.4 Following the life test, the capacitors shall be returned

to + 25 °C ± 5 °C. The leakage current, at the rated

voltage shall not exceed 200 % of the original

requirement or ± 10 μA, whichever is greater; the

equivalent series resistance shall not be greater than

200 % of the original requirement; the capacitance

value shall not increase by more than 10 % or decrease

by more than 20 % from the initial measurement.



DF

2

fRC

10

4

------------------

=

DF

13.26

---------------

=

DF

2

10

4

----------------------------------------------

13.26

----------------

9.05 %

==

=

TYPICAL LEAKAGE CURRENT FACTOR

RANGE

TEMPERATURE

HOURS

% RATED VOLTAGE

+ 175 °C

2000

50

+ 175 °C

300

65

+ 200 °C

300

60

0

10

20

30 40 50 60

90 100

70 80

1.0

0.9

0.8

0.6

0.5

0.7

0.4

0.3

0.2

0.09

0.08

0.06

0.05

0.07

0.04

0.03

0.02

0.1

0.01

PERCENT OF RATED VOLTAGE