FN 7660 Feed through filters offer a high insertion loss across a broad band of frequencies from a few tens of kHz up to the GHz region. In general, feed through filters offer a higher level of EMI suppression than feed through capacitors of the same current rating. This is particularly relevant to applications where source impedance is smaller than 50 Ω. Different versions are available offering a wide selection on operating currents and performance levels. DC feed through filters are designed and approved for 130 VDC/130 VAC 50/60 Hz operation.