High Voltage Snubber Capacitor

A snubber capacitor is a device used to protect sensitive electronic equipment from voltage spikes. These devices are typically used in high voltage applications where there is a risk of damage to the device due to sudden voltage spikes. Snubber capacitors are designed to absorb energy from these spikes and prevent them from damaging equipment.

When the power supply voltage changes (instantaneous change), such as a voltage drop, the capacitor discharges to compensate for the loss; on the contrary, the capacitor absorbs part of the change to achieve a buffer effect; so the buffer capacitor is not an absorbing capacitor, and the second is to absorb electric energy through the energy storage function of the capacitor. The purpose of stable voltage and waveform has been achieved.

Types of snubber capacitors

Snubber capacitors are used to provide a low impedance path to ground for high frequency transients. They are commonly used in power supplies, motor drives, and other applications where high frequency noise is present. There are three main types of snubber capacitors: metal oxide varistors, film capacitors, and electrolytic capacitors.

When selecting a snubber capacitor, the following factors must be considered:

Voltage: The rated voltage of the capacitor must be greater than or equal to the peak voltage of the rectified waveform.

Capacitance: The capacitance of the capacitor must be large enough to provide the required energy storage.

Temperature: Capacitors must be able to operate at the extreme temperatures encountered in the application.

Metal oxide varistors are the most common type of snubber capacitors, they are made of metal oxide materials that are highly resistant to voltages above their breakdown voltage. This makes them ideal for absorbing high frequency spikes. Metal oxide varistors are commonly used in line filter and converter circuits.

Snubber capacitor function

Film capacitors are another type of snubber capacitor, made of a dielectric film and metal electrodes. They have very low impedance at high frequencies and can be used in a wide range of applications. Film capacitors are commonly used in power supplies and motor drives.

The last type of snubber capacitor is an electrolytic capacitor. They are made of an electrolyte between two conductive plates. Electrolytic capacitors have very high impedance at low frequencies, but their impedance decreases at high frequencies. They are commonly used in audio coupling applications.

Snubber capacitors are used to protect sensitive electronics from voltage spikes. They are typically used in applications where there is a risk of high voltage spikes, such as AC/DC power converters or motor controllers. Snubber capacitors can also be used to reduce electrical noise.

Sunray Link is a supplier of capacitors and other components. It has a research and development and production team for power electronic film capacitors, providing customers with reliable and guaranteed terminal equipment of excellent quality. If you are interested in our products, you can buy with confidence.