591D226X_020R2T datasheet(7/10 Pages) VISHAY

Part #	591D226X_020R2T

Description	Solid Tantalum Chip Capacitors TANTAMOUNT, Low Profile, Low ESR, Conformal Coated, Maximum CV

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95

591D

Vishay Sprague

Document Number 40012

Revision 22-Nov-04

For technical questions, contact tantalum@vishay.com

P = Power Dissipation in Watts @ + 25°C as given

in the table in Paragraph Number 6.0 (Power

Dissipation)

RESR = The capacitor Equivalent Series Resistance

at the specified frequency.

3.

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 6.0 (Power

Dissipation).

RESR = The capacitor Equivalent Series Resistance

at the specified frequency.

7.1

At + 25

°C, the leakage current shall not exceed

the value listed in the Standard Ratings Table.

7.2

At + 85

°C, the leakage current shall not exceed 10

times the value listed in the Standard Ratings Table.

7.3

At + 125

°C, the leakage current shall not exceed

12 times the value listed in the Standard Ratings

Table.

8.

Equivalent Series Resistance: Measurements shall

be made by the bridge method at, or referred to, a

frequency of 100 KHz and a temperature of + 25°C.

8.1

The Equivalent Series Resistance shall not exceed the

value listed in the Standard Ratings Table.

9.

Life Test: Capacitors shall withstand rated DC

voltage applied at + 85°C for 2000 hours or derated

DC voltage applied at + 125°C for 1000 hours.

9.1

Following the life test, the dissipation factor and

leakage shall meet the initial requirement; the

capacitance change shall not exceed ± 10% of the

initial value.

10

Humidity Test: Capacitors shall withstand 1000 hours

at + 40°C, 90% to 95% relative humidity, with no

voltage applied

10.1

Following the humidity test, capacitance change shall

not exceed ± 10% of the initial value, dissipation factor

shall not exceed 150% of the initial requirement;

leakage currrent shall not exceed 200% of the initial

requirement at + 25°C

11.

Solderability: Capacitors will meet the solderability

requirements of ANSI/J-STD-002, test B category 1.

PERFORMANCE CHARACTERISTICS (Continued)

12.

Resistance to Soldering Heat: Capacitors mounted

on a substrate will withstand + 260°C for 5 seconds.

12.1

Following the resistance to soldering heat test,

capacitance, dissipation factor and DC leakage

current shall meet the initial requirement.

13.

Marking: The small body area of these capacitors

does not allow elaborate marking schemes. All

required information is present on the carton or

package in which the parts are shipped; in addition,

part number, quantity and data code are indicated on

the reels.

14.

Terminal Strength: Per IEC-384-3, minimum of

5N shear force.

15.

Environmental: Mercury, CFC and ODS materials

are not used in the manufacture of these capacitors.

16.

Flammability: Encapsulant materials meet UL94 V0

17.

Capacitor Failure Mode: The predominant failure

mode for solid tantalum capacitors is increased

leakage current resulting in a shorted circuit. Capaci-

tor failure may result from excess forward or reverse

DC voltage, surge current, ripple current, thermal

shock or excessive temperature.

The increase in leakage is caused by a breakdown of

the Ta

2O5 dielectric.

For additional information on

leakage failure of solid tantalum chip capacitors, refer

to Vishay Sprague Technical Paper, “Leakage Failure

Mode in Solid Tantalum Chip Capacitors.”

P

RESR

Irms =

Vrms = Irms x Z

P

RESR

Vrms = Z

GUIDE TO APPLICATION

1.0

Recommended rated working voltage guidelines:

(-55°C to + 85°C)

Application Voltage

Recommended Capacitor

(V)

Voltage Rating (V)

2.5

4

6.3

58

610

10

16

12

20

18

25

2.

A-C Ripple Current: The maximum allowable ripple

current shall be determined from the formula:

where,

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