VDRS20W275BSE

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A varistor, also known as a Voltage-Dependent Resistor (VDR) or Voltage-Variable Resistor (VVR), is an electrically variable resistor. Varistors provide a simple and effective means to protect electronic devices from overvoltage and lightning strikes. A Varistor device, such as a VDR20W275BSE, typically consists of a ceramic disc with two electrodes; when there is a sudden increase in voltage it acts as an open circuit and allows any surge to dissipate in the form of heat. This reduces the amount of damage done to the device. It is widely used in a variety of applications from industrial to consumer electronics, making it a crucial component in the buildup of the electrical safety infrastructure of devices.

The VDR20W275BSE is a non-linear resistor made up of a Zinc Oxide disc with two electrodes. It has been specifically designed for use in overvoltage protection of AC power controllers. It offers up to 20 watts of protection and an operating voltage of up to 275V. It is also designed to be very efficient and act quickly when it comes into contact with an overvoltage surge, dissipating the surge in the form of heat as fast as possible. As it is a small component with low capacitor allowance, it is ideal for use in places where space is an issue.

The VDR20W275BSE is used in a variety of applications. It is commonly used in consumer electronics such as televisions, DVD players, and other AC controllers as a means of overvoltage protection. It is also used in automotive applications such as in the engine control modules of vehicles, as it helps provide protection against voltage spikes from the ignition system. Additionally, it can be used in industrial applications such as power supplies and motor controllers, as well as in medical and healthcare products such as pacemakers and defibrillators.

The working principle of the VDR20W275BSE is simple. When a surge occurs, the voltage across the electrodes causes the resistance of the disc to decrease and the current to increase. This action allows for the surge to dissipate as heat quickly and effectively, thus providing protection to the device. When the voltage decreases, the resistance of the disc rises back to its normal value and the current decreases.

In conclusion, the VDR20W275BSE is a small, efficient device that is used as an overvoltage protection element in a variety of applications. It works quickly and effectively to protect against high voltages and dissipate surges in the form of heat. This makes it an ideal choice for the electrical safety infrastructure of various electronic devices.

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