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CWR06

Vishay Sprague

Document Number 40009

Revision 16-Nov-04

For technical questions, contact tantalum@vishay.com

7.1

At + 25

leakage current for any capaitor shall not exceed

the maximum value listed in the Standard Ratings

Table

7.2

At + 85

leakage current for any capacitor shall not exceed the

maximum value listed in the Standard Ratings Table.

7.3

At + 125

leakage current for any capacitor shall not exceed the

maximum value listed in the Standard Ratings Table.

8.

Life Test: Capacitors shall be capable of withstanding

a 2000 hour life test at the + 85˚C rated DC working

voltage or a 2000 hour life test at the + 125˚C derated

working voltage.

8.1

Following the life test, the capacitors shall meet the

following requirements: the capacitance at + 25˚C

shall not have changed by more than ± 10% from the

PERFORMANCE CHARACTERISTICS (Continued)

intital value; the dissipation factor shall meet the initial

requirements; the leakage current shall not be more

than the original requirements.

9.

Reflow Soldering: It is recommended that these

capacitors be reflow soldered at a temperature of not

greater than + 250˚C for a period of not more than 30

seconds.

10.

Marking: The small body area of these capacitors

does not permit elaborate marking schemes.

Required information will be distinctly marked on the

carton or packages in which the units are shipped.

Capacitors may be ordered with color coding at

additional cost. Color coding shall be as mutually

10.1

Polarity: The anode terminal of each capacitor is

identified by the weld and dimple projection on the

anode cap (see Dimensional Configurations).

5.

Power Dissipation: Power dissipation will be

affected by the heat sinking capability of the mounting

surface. Non-sinusoidal ripple current may produce

heating effects which differ from those shown. It

is important that the equivalent

established when calculating permissible operating

levels. (Power Dissipation calculated using + 25°C

temperature rise.)

Temperature

Derating Factor

+ 25°C

+ 55˚C

+ 85°C

+ 125°C

1.0

0.9

0.8

0.4

1.

A-C Ripple Current: The maximum allowable ripple

current shall be determined from the formula:

where,

P

=

Power Dissipation in Watts @ + 25°C as

given in the table in Paragraph Number 5

(Power Dissipation).

at the specified frequency.

2.

A-C Ripple Voltage: The maximum allowable ripple

voltage shall be determined from the formula:

or, from the formula:

where,

P

=

Power Dissipation in Watts @ + 25°C

as given in the table in Paragraph Number 5

(Power Dissipation).

at the specified frequency.

Z

= The capacitor impedance at the specified

frequency.

P

P

GUIDE TO APPLICATION

2.1

The sum of the peak AC voltage plus the DC voltage

shall not exceed the DC voltage rating of the

capacitor.

2.2

The sum of the negative peak AC voltage plus the

applied DC voltage shall not allow a voltage

reversal exceeding 10% of the DC rating at + 25°C.

3.

Reverse Voltage: These capacitors are capable of

withstanding peak voltages in the reverse direction

equal to 10% of the DC rating at + 25°C, 5% of the

DC rating at + 85°C and 1% of the DC rating at

+125°C.

4.

Temperature Derating: If these capacitors are to be

operated at temperatures above + 25°C, the

permissible rms ripple current or voltage shall be

calculated using the derating factors as shown: