In most power supply circuits, electronic components such as varistors are generally used. There are many things that need to be paid attention to when using them. Otherwise, the varistors are still easily damaged. The following is the use of varistors. Some special notes:

1. The voltage of the circuit

When selecting a varistor, special attention should be paid to: the voltage applied to the varistor should be kept below the maximum allowable circuit voltage, which is particularly critical when selecting a varistor. If the varistor is selected incorrectly, it is easy to cause product failure, short circuit, and eventually damage to the varistor.

2. Be sure to choose a varistor with a good reputation

At present, the varistor industry is particularly chaotic. In order to fight the price war, small chips are used to replace large chips, and inferior chips are used. The silver content is insufficient, and the silver-coated area is small, resulting in extremely poor performance of the varistor. Although it is very cheap, its quality is extremely high. Poor, even this kind of garbage varistor is better not to use, we recommend that you choose a varistor brand with a good reputation, such as our Keya HEL varistor.

3. Temperature

The operating temperature of the varistor working in the circuit is kept within the operating temperature range indicated on the product specification. If the temperature is too high or too low, the varistor may eventually be damaged, so special attention must be paid to the humidity.

4. Certification

Regular varistors need to pass many safety certifications. Be sure to choose certified safety capacitors, and pay special attention not to buy inferior varistors that are OEM or decks. Their quality is generally very poor.