V120ZT6PX2855

TVS - Varistors, MOVs is an electric component that is widely used in an electronic circuit for the protection of sensitive devices. It can provide an extra surge current for AC or DC circuits when it reaches a certain voltage, protecting the component from damage caused by excess power surges.

The V120ZT6PX2855 is a medium size voltage sensing varistor, as its name indicate. It is used in AC applications with circuit voltage up to 600Vac. The device consists of two electrodes, one of which is the basic metal oxide panel, while the other is a conductive layer on the surface. It is designed with a floating port that can move when the excessive current passes through the port, and then the current is diverted away from the port.

In addition to the AC applications, the V120ZT6PX2855 can also be used in DC circuits with circuit voltage remaining below 18Vdc. Moreover, the device provides an overvoltage protection above 28Vdc, which makes it a suitable choice for different type of applications. As the capacitance between the two electrodes of the device remains constant, the device can provide the same current-limiting capability in AC and DC applications.

The working principle of the V120ZT6PX2855 is based on the resistive-capacitive (RC) circuit. This type of device works in two stages: in the first stage, it stores the excess energy during surges, and in the second stage, it dissipates the stored energy in the form of heat.

In the first stage, when the circuit voltage reaches the threshold, the device starts to absorb the excess energy by storing it inside a capacitor. As the capacitor stores more energy, it produces an offset voltage across the varistor, which is called as the "breakdown voltage". The varistor then acts as a short circuit to divert the excess voltage away from the sensitive components of the circuit.

In the second stage, the stored energy is dissipated in the form of heat. The heat produced is dissipated from the device by a control circuit, thereby preventing damage of the sensitive components. This process is called "thermal shutoff" and it ensures that the varistor can protect the sensitive device from further damage.

The V120ZT6PX2855 application field is primarily in commercial electronics such as home appliances, computers, and communication systems, among others. It is also used in home entertainment systems, automotive electronics, lighting systems, and medical systems. The device is capable of handling transient voltages of up to 600Vac, and offers an excellent combination of safety, reliability, and affordability.

The V120ZT6PX2855 is an ideal choice for an electronic circuit protection device, as it offers superior protection against power surges while providing excellent thermal and electrical properties. With its two-stage working principle, it ensures that the sensitive components of the circuit are safe from any kind of electrical or thermal damage.