What are the Main Parameters of ZnO Varistors? Usage Precautions?

ZnO varistors are a commonly used electronic component for protecting electronic equipment from the effects of overvoltage. Their main parameters include:

1. Rated Voltage: The maximum voltage value that the ZnO varistor can withstand under standard operating conditions.
2. Rated Power: The maximum power value that the ZnO varistor can withstand under standard operating conditions.
3. Resistance: The resistance value of the ZnO varistor, which may vary under different operating conditions.
4. Capacitance: The capacitance of the ZnO varistor, typically smaller than that of a resistor with comparable parameters.
5. Response Time: The reaction time of the ZnO varistor when subjected to overvoltage.

When using ZnO varistors, the following points should be noted:
1. It is essential to select ZnO varistors that meet the design requirements to ensure their normal operation and the stability of the protected equipment.
2. Choose ZnO varistors with the correct rated voltage and power to avoid overvoltage and electrical power exceeding the device's capacity.
3. During use, avoid applying excessive peak voltages to the ZnO varistor to prevent damage to the component.
4. Strictly select and install ZnO varistors according to the requirements of the application site, avoiding excessive vibration or mechanical damage.
5. Store and use ZnO varistors safely to prevent mechanical or chemical damage.
6. Do not touch the pins or surface of the varistor with your hands to avoid electrical hazards or damage to the component.