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Use of varistor

Date：2019-12-28 12:00:08 From：JPET

A varistor is an electronic component that everyone will often use, because a varistor can be used to prevent lightning. Using its nonlinear characteristics, when an overvoltage occurs between the two poles of the varistor, the varistor can The voltage is clamped to a relatively fixed voltage value, thereby achieving protection for the subsequent stage circuits. However, what are the things we need to know in the usual use of varistor? Notes for using varistor are as follows:
① Do not beat or press hard.
② Store in a dust-free and dry environment.
③ Do not place flammable substances near the varistor.
④ Do not make the current and energy flowing into the varistor exceed its rated value.
⑤ When welding, be careful not to melt the solder joints and resin of the varistor.
⑥ Varistors may cause other problems due to the effects of the impedance of their capacitors in high-frequency applications.
⑦ Direct exposure to the sun or the ambient temperature near the heater may exceed the operating temperature that the varistor can withstand.
⑧If the application of the varistor is similar to the high voltage line that withstands thunder, it is recommended to install the varistor on the 220v power line.

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