.The COV 25E471K is a varistor with a Through Hole mounting style that is RoHS compliant. It has a rated voltage of 400V and a capacitance of 47nF. The rated dissipation energy is 28J, the rated hold current is 15A, and the tolerance is 15%. This varistor is built with a ceramic plate, an epoxy resin, and a metal oxide core. It is most commonly used in applications where there is a need for high surge absorbing capacity. Additionally, it helps to protect circuits and components from sudden electrical voltage changes.