FLT-530/E filter has been designed and manufactured for rejecting supply line noise of armored vehicle. This frequency spectrum affects transmitting process of radio available inside the vehicle and as a result it causes some problems for voice communication. Maximum 10A current, 28V voltage of the radio, and frequency range of 1KHz are considered to design the filter.
Actually FLT-530/E is a filter for supply line which should be function as a low-pass filter and attenuate more than 1KHz frequency spectrum in amount of 40dB.