Datasheet > ER20-254

ER20-254

更新时间： 2024-11-12 10:14:55

品牌	Logo	应用领域
威世 - VISHAY		电容器
页数	文件大小	规格书
4页	397K
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DC Filter Capacitors

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ER20-254 数据手册

Vishay ESTA

DC Filter Capacitors

RIPPLE

The sum of the peak ripple voltage and the DC voltage

should not exceed the rated voltage. Refer to graph fig. 1 for

permissible peak-to-peak ripple voltage as a percentage of

rated voltage for various frequencies.

TYPE ER

100

Fig. 1

1000

10 000

FREQUENCY Hz

Capacitors offer unusually good electrical characteristics,

coupled with very small size. The ER range of capacitors are

manufactured using a mixed dielectric material that consists

of polyester/polypropylene. The container is a rolled

seamed tinplate case that is hermetically sealed. The

construction is designed to prevent internal movement

when subjected to shock and vibration.

POWER FACTOR

The power factor is variable, and a function of temperature

and frequency. See fig 2. Nominal value < 0.5 % at 20 °C.

at 20 °C

Power Factor

vs.

Note

Temperature

2 %

•

The impregnant used is a non toxic highly refined, purified and

inhibited mineral oil.

1 kHz

1 %

50 Hz

APPLICATIONS

The ER range of capacitors are specifically designed for DC

applications.

0 %

65 80

- 20

Fig. 2

DIELECTRIC RESISTANCE

• Audio coupling

(Parallel resistance) is indicated by the graph of insulance

(MΩ x μF) vs temperature fig 3. The insulance (MΩ x μF) is

nominally 10 000 s at + 20 °C. (Measurements taken after

1 minute with an applied voltage of 500 V).

• Pulse forming networks

• Oscillator circuits

• Arc and spark suppression

• RF by-pass

10⁵

• Tuned filters

10⁴

• Energy storage

• Integrating circuits

• Low and high pass filters

• High voltage smoothing

10³

Insulance vs. Temperature

Typical Values

10²

- 40

Fig. 3

Capacitors required for AC applications and high discharge

rates can also be designed from the ER range.

LIFE EXPECTANCY

Consult Vishay Electronic GmbH, Division Roederstein

ESTA and Hybrids for your specific requirements.

ER type capacitors are designed for a life exceptancy of

50 000 h at 65 °C. To achieve the same life expectancy

at 85 °C derate to 60 % of rated voltage fig 4.

TEMPERATURE RANGE

Temperature range is - 55 °C to + 85 °C. The nominal

voltage rating is applicable from - 55 °C to + 85 °C.

10⁵

10⁴

10³

Derating is required for higher operating temperatures.

TEMPERATURE COEFFICIENT

Capacitance will increase by 2 % per 100 °C temperature

change.

10²

150 °C

Rated Voltage

100

Fig. 4

Document Number: 13013

Revision: 11-Aug-10

For technical questions, contact: esta@vishay.com

www.vishay.com

12 3 4

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