The 07D680K is a Varistor manufactured by SOCAY. It is a 56V 135V 250A Through Hole RoHS varistor, typically used for surge protection applications. It is made of a non-linear, reversible semiconductor material and can be used as a voltage clamping device to protect circuits from surges through alternating current. This varistor is RoHS approved, and has an operating temperature between -40 degrees Celsius and +85 degrees Celsius. It is available in to-263 4L package style.