The 20D221K is a varistor with through hole construction and RoHS compliance, manufactured by SOCAY. It has a fast response time, a high AC peak current rating, low leakage current, as well as excellent clamping performance. It is suitable for use in a wide variety of applications, including over-voltage protection, EMC, and filtering. It features a stand-off with a maximum rated voltage of 220V AC, a capacitance of 2200pF, and a maximum DC voltage of 18V. The varistor's small physical size and flexibility make it ideal for use in a variety of locations with limited space. The 20D221K is RoHS-certified and meets or exceeds industry standards.