TWXFZ 140266, TWXFZ 140316, TWXFZ 140376

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Vishay Draloric

Revision: 11-Sep-15

1

Document Number: 22132

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

Watercooled RF Power Pot Capacitors

Internal Cooling System

PRODUCT DESCRIPTION

TWXFZ pot-styled capacitors dissipate the heat produced

under load by means of water flow around the capacitor

elements. In order to provide protection from influences of

the chemical / physical characteristics of the coolant, a

glass passivation layer is applied over the cooled noble

metal electrode.

The electrical terminations are made directly to the noble

metal electrodes utilizing special soldering techniques. This

method of attachment provides a strong, rigid connection of

unsurpassed reliability. The TWXF pot-styled capacitors

feature

an

umbrella

shaped

insulating

rim

made

from silicone elastomer to minimize the adverse effects

of moisture,

dust

and

other

impurities

in

the

working environment and to improve the characteristics of

the

electrical

field.

The

capacitor

body

is

protective lacquered.

MARKING

Type designator, capacitance value and tolerance, rated RF

voltage, ceramic material code, production date code,

manufacturer logo, serial number.

ACCESSORIES ADDED

All

watercooled

pot

capacitors

are

supplied

with

the necessary screws / nuts to make the connection to the

electrode terminals. Ferrules and water fittings for the water

supply connections are also included.

FEATURES

• High voltage, current and power ratings

• Compact design reduces terminal self inductance and

permit operation up to higher frequencies

• These pot capacitors feature increased density through

watercooling and rugged mechanical construction for a

maximum reliability

APPLICATIONS

Watercooled RF power pot capacitors are designed for use

in the tank circuit of high power RF equipment such as

induction heating and welding equipment, dielectric heating

or a variety of specialized RF applications.

CAPACITANCE RANGE

7.5 nF to 10.0 nF

CAPACITANCE TOLERANCE

± 10 %

CERAMIC DIELECTRIC

R85 (TCC - 750 ppm/K)

RATED VOLTAGE

DIELECTRIC STRENGTH TEST

125 % to 200 % of rated voltage, 50 Hz

RF POWER TEST

120 % to 140 % of rated power, for 10 minutes in a

test generator circuit

DISSIPATION FACTOR

Max. 0.05 %

Measuring frequencies:



300 kHz or 100 kHz

INSULATION RESISTANCE

Min. 10 000 M

 (at 25 °C)

OPERATING TEMPERATURE RANGE

Details of watercooling find under “Guidelines”, next pages

QUICK REFERENCE DATA

DESCRIPTION

VALUE

Ceramic Class

1

Ceramic Dielectric

R85

Type

TWXFZ

140266

TWXFZ

140316

TWXFZ

140376

14 000

22 500

20 000

27 000

Min. Capacitance (pF)

10 000

7500

10 000

7500

Max. Capacitance (pF)

10 000

7500

10 000

7500

Mounting

Screw terminal