The FN-4377W from Filtronetics is a Low Pass RF Filter with Frequency DC to 82 MHz, Stopband Frequency 90 to 500 MHz, 3 dB Cutoff Frequency 82 MHz, Insertion Loss 0.25 dB, Rejection 50 dB. Tags: Drop-In, Module with Connector. More details for FN-4377W can be seen below.
