The 10D681K is an RoHS compliant, Through Hole mounted Varistor, manufactured by COV. It has a rated voltage of 560V - 1120V and a maximum current rating of 2.5KA. The Varistor is designed to protect circuits from surges and transients, due to its characteristics that include a wide operating voltage range, high pulse handling, low temperature stability, low leakage current, and fast response time. Additionally, the 10D681K features a ruggedized construction, making it ideal for harsh environments.