TWXFZ 140266, TWXFZ 140316, TWXFZ 140376
www.vishay.com
Vishay Draloric
Watercooled RF Power Pot Capacitors
Internal Cooling System
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.
QUICK REFERENCE DATA
DESCRIPTION
CAPACITANCE RANGE
VALUE
1
Ceramic Class
7.5 nF to 10.0 nF
Ceramic Dielectric
R85
CAPACITANCE TOLERANCE
TWXFZ TWXFZ
140266 140316
TWXFZ
140376
Type
10 ꢀ
Voltage (Vp)
14 000 22 500
20 000
27 000
7500
CERAMIC DIELECTRIC
Min. Capacitance (pF) 10 000
Max. Capacitance (pF) 10 000
Mounting
7500
7500
10 000
10 000
R85 (TCC - 750 ppm/K)
7500
Screw terminal
RATED VOLTAGE
• 14 kVp
PRODUCT DESCRIPTION
• 20 kVp
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
• 22.5 kVp
• 27 kVp
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 ꢀ
the
electrical
field.
The
capacitor
body
is
Measuring frequencies:
300 kHz or 100 kHz
protective lacquered.
MARKING
INSULATION RESISTANCE
Type designator, capacitance value and tolerance, rated RF
voltage, ceramic material code, production date code,
manufacturer logo, serial number.
Min. 10 000 M (at 25 °C)
OPERATING TEMPERATURE RANGE
ACCESSORIES ADDED
Details of watercooling find under “Guidelines”, next pages
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.
Revision: 11-Sep-15
Document Number: 22132
1
For technical questions, contact: powcap@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