TVS - Varistors, MOVs

VE07M00131K is a varistor (Voltage Dependent Resistor). A varistor is a device that exhibits wide variations in electrical resistance when exposed to varying levels of AC voltage. In essence, it acts as a "variable conductor" that changes its resistance when the voltage exceeds a certain threshold. As an active component, a varistor can be used to create a "passive protection" system designed to prevent overvoltage damages and/or catastrophic failure of circuits.

Applications

Due to its low cost and high stability, the VE07M00131K has been widely used in various applications such as surge protection, lightning protection, and overvoltage protection in a variety of electrical and electronic systems. It is used in ac-dc converters, AC filter circuits, lightning protection circuits, noise suppression, overvoltage protection, and many other applications. It can be used in a wide range of working temperatures, which makes it suitable for applications in harsh environments. In addition, due to its low capacitance, it can be used in high frequency applications as well as in high frequency switching circuits.

Working Principle

The VE07M00131K works by connecting two electrodes to a dielectric material surrounded by a semi-conductive medium. When the applied voltage exceeds a certain threshold, the current flowing through the medium will increase, causing the resistance to drop drastically. As the voltage decreases, the resistance will again increase. This type of device is also known as an avalanche diode because of the sudden large current increase during an overvoltage condition. A surge dampening, a protective effect is created when the voltage passes through the material, which helps to protect the circuit from overvoltage.

Limitations

Although the VE07M00131K is a reliable and efficient device, there are a few limitations that should be noted. First, this type of component does not perform well in low temperature conditions since the dielectric material used in its construction has a lower breakdown voltage under those conditions. In addition, this device also has a limited range of operation, which means that it cannot provide adequate protection against surges in higher voltage scenarios. Lastly, due to its relatively large capacitance, it is not suitable for high frequency applications.

Conclusion

The VE07M00131K is an effective and reliable device commonly used for a variety of different applications. Its ability to change its resistance when exposed to varying levels of AC voltage makes it an excellent choice for protecting circuits against overvoltage damages and/or catastrophic failure. While there are a few limitations that should be noted, such as its low temperature sensitivity and its limited frequency range, the VE07M00131K remains a popular choice for many applications.