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About High Voltage Capacitors
High voltage capacitors are passive electronic components that store charge and energy for use in high voltage applications. They consist of two conducting plates separated by an insulating material called the dielectric. Film capacitors are high voltage capacitors made out of plastic. There are two basic types. Film-foil capacitors include one or more layers of a plastic film dielectric wound alternately with metal foil electrodes. Metallized film capacitors consist of a film dielectric on which the metal electrode has been vapor-deposited. The layers are wound into a convoluted roll so that the electrodes extend beyond the dielectric films. Capacitance, a measure of energy storage ability, is typically expressed as C = K A/D, where A is the area of the electrodes, D is their separation, and K is a function of the dielectric between the electrodes.
Selecting high voltage capacitors requires an analysis of dielectric materials. Aluminum electrolytic capacitors are polar devices that feature a high volumetric density but cannot withstand reverse voltages. Ceramic capacitors are made of resistive ceramic materials and provide bonded metal contacts. Examples include ceramic Z5U, a Class III ceramic dielectric, and ceramic X7R, a temperature-stable material that is suitable for bypassing and coupling applications. Glass, mica, oil, air, and paraffin paper are other commonly used dielectric materials. Polycarbonate, polypropylene, and polystyrene are suitable for applications such as fillers and timers. Tantalum, a metallic element, is used to make a variety of alloys. Niobium, a hard ceramic material characterized by high conductivity, has similar chemical properties to tantalum.
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Engineering Web: High Voltage Capacitors
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High Voltage Experimenter's Handbook High Voltage Experimenter's Handbook [Table of Contents [What's New 24 April 2001 [Downloads |
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High Energy Corp., manufacturer of high voltage and high power... We manufacture capacitors for use in high voltage power supplies, X-ray equipment, broadcast equipment, induction heating machinery, cable fault |
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High Q Notch Filter High National Semiconductor High Q Notch Filter Linear Brief 5 Q March 1969 Notch The twin ``T'' network is one of the few RC filter networks In See National Semiconductor Information |
Part Numbers for High Voltage Capacitors
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| HIGH VOLTAGE CAPACITORS | netCOMPONENTS | Not Provided | Not Provided | Not Provided |
| 564R3DF0T10 | Future Electronics | VISHAY | Not Provided | High Voltage Ceramic Disc Capacitors 2 kVDC to 7.5 kVDC |
| 31-4760 | Newark | MCM | All Supplier Direct Ship | Ceramic Multilayer Capacitors, Capacitance: 2200 pF, Voltage: 100 V, Type: X7R, Lead Type: Radial, Features: High reliability, 2.5 mm pin pitches, high capacitance values for use where less stability is required, Quantity: 5 per bag |
| 31-4850 | Newark | MCM | All Supplier Direct Ship | Ceramic Multilayer Capacitors, Capacitance: 1000 pF, Voltage: 100 V, Type: X7R, Pin Pitch: 5.08 mm, Features: Radial, high reliability, high capacitance values for use where less stability is required, Quantity: 5 per bag |
| 31-4875 | Newark | MCM | All Supplier Direct Ship | Ceramic Multilayer Capacitors, Capacitance: 22000 Pf, Voltage: 100 V, Type: X7R, Pin Pitch: 5.08 Mm, Features: Radial, High Reliability, High Capacitance Values For Use Where Less Stability Is Required, Quantity: 5 Per Bag |
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