The 2156-20-50 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 20 MHz, Stopband Frequency 40 MHz, 3 dB Cutoff Frequency 20 MHz, Lower Rejection 40 dB@40 MHz, Upper Rejection 1 dB@40 MHz. Tags: Plug In. More details for 2156-20-50 can be seen below.
