The 2124SMD from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 5.5 MHz, Stopband Frequency 8 MHz, 3 dB Cutoff Frequency 5.5 MHz, Lower Rejection 40 dB@8 MHz, Upper Rejection 0.2 dB@8 MHz. Tags: Surface Mount. More details for 2124SMD can be seen below.
