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ET

更新时间： 2024-09-16 14:55:43

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DC Filter Capacitors

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Vishay ESTA

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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.



100

1000

10 000

Frequency Hz

Fig. 1

TYPE ET

POWER FACTOR

The power factor is variable, and is a function of temperature

and frequency see Fig. 2. Nominal value < 0.5 % at 20 °C.

These capacitors are manufactured using a mixed dielectric

material that consists of polyester / polypropylene film and

capacitor tissue. They are impregnated and filled with a

mineral oil. The container is a Synthetic Resin Bonded Paper

(SRBP) tube sealed at both ends with resin assuring

hermetic sealing. The capacitors are terminated with

M5 x 12 mm studs or tinned copper wire.



at 20 °C

Power Factor



vs.

Temperature



2 %



1 kHz



1 %

Note



50 Hz

•

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

inhibited mineral oil

0 %

-20

65 80

APPLICATIONS

Fig. 2

The ET range is specifically designed for high voltage filters

and can be successfully used in the following applications:

DIELECTRIC RESISTANCE

(Parallel resistance) is indicated by the graph of insulance

(M x μF) vs. temperature Fig. 3. The insulance (M x μF) is

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

1 minute with an applied voltage of 500 V).

• By-pass

• Coupling

• Filter applications

• X-ray power supplies

• Electrostatic air cleaners

10⁵



10⁴

TEMPERATURE RANGE

Temperature range is -55 °C to +85 °C. Derating is required

for operation at higher temperatures.

10³

10²

Insulance vs. Temperature

Typical Values

-40

TEMPERATURE COEFFICIENT

Fig. 3

Capacitance will increase by 2 % per 100 °C temperature

rise.

LIFE EXPECTANCY

ET type capacitors are designed for a life expectancy of

5000 h at 65 °C. To achieve the same life expectancy at

85 °C derate to 60 % of rated voltage Fig. 4.



CAPACITANCE RANGE

0.0005 μF to 2 μF. The tolerance is 10 %. Other tolerances

are available on request. Nominal values measured at 1 kHz.

10⁵



VOLTAGE RANGE

1000 V_DCto 60 000 V_DC, other values on request.

10⁴



10³



10²

150 °C

Rated Voltage

100

Fig. 4

Revision: 22-Nov-2019

Document Number: 13014

For technical questions, contact: esta@vishay.com

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

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

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