FN2000 AC/DC EMI Filters Schaffner FN2000 Series EMI Filters provide electromagnetic interference attenuation ranging from standard to very high. The filters support various terminal options and are available in both single- and two-stage configurations. Schaffner FN2000 EMI filters are rated for currents of 1A to 60A and can operate in temperatures ranging from -25°C to +100°C. The FN2000 series includes models designed for medical (no Y-capacitors) and safety-critical (low capacitance) applications. These filters are also available with a stud-mount option for high amperage applications.