VA2220K122R020

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VA2220K122R020 Application Field and Working Principle

Varistor arrester products offered by Alpha & Omega Semiconductor are a series of voltage dependent resistors specifically designed to protect sensitive electronic equipment from voltage surges and induced electrical transients. The VA2220K122R020 is a model in this series. This bipolar semiconductor device is used to protect circuitries such as power supplies, telecom equipment and computer buses from overvoltage conditions. It is shielded in a TO-264 package and has the dimension of 11.4mm × 11.8mm × 7.2mm.

The model VA2220K122R020 consists of two junction transistors connected in series. These two junction transistors are connected such that the anodes of one are connected to the cathodes of the other. When a high voltage is applied, the battery or voltage source connected to the two junction transistors causes a large current to flow through it that can cause damage to the circuitries.

However, thanks to the large current rating of the VA2220K122R020, it can reduce and protect your circuit from overvoltages. It has an impressive energy rating of 130 Joules, which helps it to suppress and reduce the voltage surges. The device can withstand voltages up to 5.7kV and can handle maximum pulse current up to 10A. The VA2220K122R020 consists of two independent voltage dependent resistors in series that limits the current flow in case of overvoltage or induced transients.

The working principle of the unit is simple. When the voltage applied to the unit is above a certain threshold, the voltage dependent resistors begin to conduct, limiting the amount of current that can flow through it. This current limit reduces the debris created from transients and overvoltage and keeps the connected circuitries safe. The circuitries then resume their normal operation once the voltage has subsided.

Apart from reduce or reduce overvoltages, the VA2220K122R020 also features an instantaneous response time of less than 1µs. This helps it to respond to fast and fierce electrical transients and protect the circuit from any damage. The temperature coefficient of the device is also very low, making it extremely reliable and dependable.

The VA2220K122R020 is an ideal choice for protecting circuitries from overvoltage and transients. It can be used in a multitude of applications from computer bus connections as well as power supplies and telecom equipment. So if you need to protect your circuit from short duration spikes, the VA2220K122R020 is the device for you.

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