The FTR20D821K varistor with a Through Hole, P=10mm RoHS manufactured by FTR is a high voltage protection component for use in industrial circuit boards. It is designed to absorb surges from excessive voltage that can potentially cause damage to sensitive electronic components. The FTR20D821K has an operating voltage range of 670V to 1355V, and a rated energy of 6.5KA. This varistor has a small deflection ratio of less than 10%, ensuring a fast and efficient protection for industrial electronics. The component is RoHS compliant, and its small size and light weight makes it easy to integrate into other electronic devices.