The PDLF-R3 from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 0.3 GHz, 3 dB Cutoff Frequency 0.3 GHz, Insertion Loss 2.0 dB @0.3GHz, Rejection 25 dB @0.5GHz, 35 dB @0.55GHz, Power 30 dBm. Tags: Die. More details for PDLF-R3 can be seen below.