SMD Feedthru Filters AVX SMD feedthru filters are an easy way to achieve broad band EMI reduction in a small SMD package. SMD feedthru filters can help reduce cost designs by eliminating some types of L/C filters, increasing system reliability and saving valuable PCB area. SMD feedthru filters are offered in both 0805, 1206 single element packages or in 1206 four element packages.The unique construction of a feedthru capacitor provides low parallel inductance and offers excellent decoupling capability for all high di/dt environments and provides significant noise reduction in digital circuits.