The LC9SR-30M-50-1765A from TTE Filters is a Low Pass RF Filter with Frequency DC to 30 MHz, 3 dB Cutoff Frequency 30 MHz, Insertion Loss 1 dB, Rejection 40 dBc / 60 dBc, Power 5 W. Tags: Module with Connector, Chebyshev Filter. More details for LC9SR-30M-50-1765A can be seen below.