High Voltage Ceramic Disc Capacitor

5 min read Jun 26, 2024
High Voltage Ceramic Disc Capacitor

High Voltage Ceramic Disc Capacitors: A Comprehensive Guide

What are High Voltage Ceramic Disc Capacitors?

High voltage ceramic disc capacitors are a type of capacitor that is designed to operate at high voltage levels, typically above 1 kV. They are constructed using ceramic materials and are known for their high reliability, long lifespan, and ability to withstand high voltage stress.

Construction and Characteristics

Ceramic Material

High voltage ceramic disc capacitors use a ceramic material as the dielectric. The ceramic material is typically made from a combination of metal oxide powders, such as barium titanate (BaTiO3) or strontium titanate (SrTiO3), which are mixed with other materials and then sintered to create a ceramic body. The ceramic material has a high dielectric strength, which allows it to withstand high voltage levels without breaking down.

Disc-Shaped Design

High voltage ceramic disc capacitors have a disc-shaped design, which provides a large surface area for the electrodes. The disc shape also helps to reduce the likelihood of electrical discharge, which can occur when high voltage is applied to a capacitor.

Electrodes

The electrodes of high voltage ceramic disc capacitors are typically made from metal films, such as silver or copper, which are applied to the ceramic body using a sputtering or evaporation process. The electrodes are designed to be thin and uniform, which helps to reduce the risk of electrical discharge.

Applications

High voltage ceramic disc capacitors are used in a wide range of applications, including:

High Voltage Power Supplies

High voltage ceramic disc capacitors are often used in high voltage power supplies, such as those found in medical equipment, industrial machinery, and electrical transmission systems.

Pulse Forming Networks

High voltage ceramic disc capacitors are used in pulse forming networks, which are used to generate high voltage pulses in applications such as radar systems and medical equipment.

High Energy Physics

High voltage ceramic disc capacitors are used in high energy physics applications, such as particle accelerators and radiation detectors.

Advantages

High Reliability

High voltage ceramic disc capacitors are known for their high reliability and long lifespan, making them an ideal choice for applications where downtime is not an option.

High Voltage Capability

High voltage ceramic disc capacitors can operate at high voltage levels, making them suitable for applications where high voltage is required.

Low Loss

High voltage ceramic disc capacitors have low loss, which means they can operate at high frequencies without significant energy loss.

Specifications

High voltage ceramic disc capacitors are available in a range of specifications, including:

Voltage Rating

High voltage ceramic disc capacitors are available with voltage ratings ranging from 1 kV to 100 kV or more.

Capacitance

High voltage ceramic disc capacitors are available with capacitance values ranging from a few pF to several nF.

Operating Temperature

High voltage ceramic disc capacitors can operate at temperatures ranging from -55°C to +125°C or more.

Conclusion

High voltage ceramic disc capacitors are a crucial component in many high voltage applications. Their high reliability, high voltage capability, and low loss make them an ideal choice for applications where high voltage is required.

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