Choosing and using the appropriate varistors is crucial for ensuring the safety and reliable operation of electronic devices. Here are some key points and recommendations for selecting and using varistors:
1、Rated voltage and current: When choosing varistors, it is essential to understand the design requirements of the circuit, including the range of rated voltage and current. Ensure that the selected varistors have sufficient rated voltage and current capabilities to prevent overloading and damage during operation.

2、Response time: The response time of varistors refers to the time it takes from detecting abnormal voltage or current to responding and providing protection. For applications that require fast response, such as automotive airbag systems, varistors with shorter response times should be selected.

3、Resistance value range and accuracy: Choose the appropriate resistance value range and accuracy based on the needs of the circuit. Ensure that the resistance value of varistors falls within the normal operating range and has sufficient accuracy to meet the requirements of the circuit.
4、Environmental factors: The performance of varistors may be affected by environmental factors such as temperature and humidity. When selecting varistors, consider the working temperature and humidity range of the environment and choose the appropriate model accordingly.
5、Installation and connection: Properly install and connect varistors according to the specifications and usage instructions provided by the manufacturer. Pay attention to the correct soldering methods and soldering temperatures to avoid damaging the varistors or affecting their performance.
In summary, selecting the appropriate varistors and using them correctly is an important step in ensuring the safe and reliable operation of electronic devices. Carefully consider the design requirements of the circuit, response time, resistance value range and accuracy, as well as environmental factors to ensure the selection of the most suitable varistors.