ECThe 07D681K is a varistor manufactured by COVEC that is designed with a through-hole configuration, a rated voltage of 560V-1120V, and a rated current of 1.2KA. The physical dimensions are 5.0mm diameter with RoHS certification. It is designed to protect electrical circuits from voltage transients induced by lightning and other transient voltage events. It allows over-voltage spikes to be safely dissipated through the varistor, preventing them from damaging delicate electronics.