SK 082-4-20-21 is a Schaffner combination filter choke that offers EMI/RFI filtering. It is designed for power line and high frequency applications and provides a low impedance path for the common and differential mode noise. The filter choke is rated for 20A and 200 kHz, making it suitable for use in most high current, high frequency applications. Other features include low insertion loss, high attenuation, and low temperature rise. The SK 082-4-20-21 can be used in a variety of industrial, commercial, and home applications.