FN 3287/3288 EMC/RFI Filters Schaffner FN 3287/3288 EMC/RFI Filters are based on an innovative filter topology with state-of-the-art EMI attenuation. These filters ensure compliance with Class C2 or C1. The FN 3287/3288 filters come in a slim book-style shape that saves space and allows for installation next to inverters, converters, or motor drives. These Schaffner filters act as solid safety connector blocks and are available in HVIT, IT, and low-leakage current versions. The FN 3287 filters offer standard attenuation performance, while the FN 3288 filters provide high attenuation performance. Typical applications include process automation equipment, 3-phase power supplies, low-leakage current requirements, and IT power distribution networks.