An article to help you understand what a varistor is

System Dec 14 3

A varistor is a resistor whose resistance changes with voltage, also known as a "voltage-sensitive resistor" or "overvoltage protector". It is a nonlinear resistor typically made of semiconductor materials such as zinc oxide, with the characteristic of rapidly changing resistance value when the voltage exceeds a specific threshold. Varistors are widely used in electronic circuits to protect the circuit from overvoltage damage.

The working principle of a varistor is based on the nonlinear resistance characteristics of semiconductor materials. Within the normal operating voltage range, the resistance value of the varistor is very high, almost negligible. However, when the voltage exceeds the set threshold, the carriers in the semiconductor material are excited, causing the resistance value to drop sharply, thereby absorbing the energy of the overvoltage and protecting other components in the circuit from damage.

The main features of varistors include:

1. High response speed: Varistors can quickly respond when the voltage exceeds the threshold, absorbing the energy of the overvoltage to protect other components in the circuit.

2. High energy absorption capacity: Varistors can absorb a large amount of overvoltage energy, effectively protecting components in the circuit.

3. High reliability: Varistors have stable performance and long life, and can work normally in harsh environmental conditions.

4. High power capacity: Varistors can withstand high power, suitable for protection in various high-power circuits.

Varistors are widely used in electronic circuits for overvoltage protection, surge suppression, power supply filtering, and other applications. In circuit design, varistors are typically connected to the input or output of the circuit to protect other components in the circuit from overvoltage damage. For example, in power line circuits, varistors can be used to absorb surge voltages on the power line, protecting components such as power switches and rectifiers from damage.

In conclusion, varistors are important electronic components that can effectively protect other components in the circuit from overvoltage damage. In the design and production of electronic devices, the proper selection and application of varistors are crucial for improving the reliability and stability of the circuit and extending the lifespan of the equipment. It is hoped that through this article, readers have gained a deeper understanding of varistors.

A varistor is a resistor whose resistance changes with voltage, also known as a "voltage-sensitive resistor" or "overvoltage protector". It is a nonlinear resistor typically made of semiconductor materials such as zinc oxide, with the characteristic of rapidly changing resistance value when the voltage exceeds a specific threshold. Varistors are widely used in electronic circuits to protect the circuit from overvoltage damage.

The working principle of a varistor is based on the nonlinear resistance characteristics of semiconductor materials. Within the normal operating voltage range, the resistance value of the varistor is very high, almost negligible. However, when the voltage exceeds the set threshold, the carriers in the semiconductor material are excited, causing the resistance value to drop sharply, thereby absorbing the energy of the overvoltage and protecting other components in the circuit from damage.

The main features of varistors include:

1. High response speed: Varistors can quickly respond when the voltage exceeds the threshold, absorbing the energy of the overvoltage to protect other components in the circuit.

2. High energy absorption capacity: Varistors can absorb a large amount of overvoltage energy, effectively protecting components in the circuit.

3. High reliability: Varistors have stable performance and long life, and can work normally in harsh environmental conditions.

4. High power capacity: Varistors can withstand high power, suitable for protection in various high-power circuits.

Varistors are widely used in electronic circuits for overvoltage protection, surge suppression, power supply filtering, and other applications. In circuit design, varistors are typically connected to the input or output of the circuit to protect other components in the circuit from overvoltage damage. For example, in power line circuits, varistors can be used to absorb surge voltages on the power line, protecting components such as power switches and rectifiers from damage.

In conclusion, varistors are important electronic components that can effectively protect other components in the circuit from overvoltage damage. In the design and production of electronic devices, the proper selection and application of varistors are crucial for improving the reliability and stability of the circuit and extending the lifespan of the equipment. It is hoped that through this article, readers have gained a deeper understanding of varistors.