The 20D431K Varistor manufactured by Hongzhi is a 350V-710V 6.5KA through hole RoHS compliant electrical part. It is used in circuit-level protection to protect components from voltage surges. It helps absorb transient voltage spikes that could potentially cause circuit damage or malfunction due to over-voltage. This part also allows for current limitation, providing circuit-level protection in the event of large power surges. The 20D431K is suitable for applications such as computer motherboards, home appliances, power supplies, motor drives, industrial electronics, and more.