V20E460PL1A

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Varistors, MOVs, and spark gaps are components commonly used to protect sensitive electronic equipment from transient voltages that exceed a specified rating. The V20E460PL1A is a particular type of varistor designed for AC line protection. This application note provides an overview of the V20E460PL1A application field and working principle.

Varistors are voltage dependent resistors (VDRs) that are designed to protect sensitive electronic equipment from transient overvoltage events. Varistors are typically constructed of zinc oxide (ZnO), an inexpensive, non-toxic, non-silicon ceramic material. ZnO varistors have a wide impedance range, making them versatile and suitable for many application fields. V20E460PL1A is a ZnO varistor with a ±20 volt rating, an energy dissipation rating of 8 Joules, and a peak power rating of 1.8 KW. These parameters make the V20E460PL1A suitable for AC line protection applications.

Understanding the working principle of varistor is important to determine its proper application usage. When the voltage across the varistor exceeds the rated voltage (20 volts for V20E460PL1A), the varistor begins to conduct. The resistance of the varistor is constant until the voltage reaches the clamping voltage. At the clamping voltage, the varistor “clamps” the transient voltage and the current through the varistor is limited. The precise amount of current that can be passed through the V20E460PL1A is 1.8 KW.

The V20E460PL1A is specifically designed for AC line protection in household appliance, lighting and industrial equipment. It comes with two mounting options, PCB mounting as well as screw mounting. The V20E460PL1A offers excellent surge protection up to 8 Joules. It also has a particularly low leakage current level, making it suitable for low voltage AC line protection applications. In addition, the V20E460PL1A has a small form factor which allows it to be mounted in tight spaces where larger varistors may not fit.

In summary, the V20E460PL1A is a ZnO varistor designed for AC line protection applications. It has a ±20 volt rating with an energy dissipation rating of 8 Joules and peak power rating of 1.8 KW. The varistor operates by clamping the transient voltage when it exceeds the rated voltage. It has two mounting options, and can be used for low voltage AC line protection applications due to its low leakage current level. The small form factor makes it suitable for applications where space is limited.

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