The 2275-5 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 0.5 MHz, Stopband Frequency 800 KHz, 3 dB Cutoff Frequency 0.5 MHz, Lower Rejection 52 dB@800 KHz, Upper Rejection 3 dB@800 KHz. Tags: Plug In. More details for 2275-5 can be seen below.