The RSF-634.500-35000-1109-TR from Raltron is a Band Pass Filter with Frequency 617 to 652 MHz, Bandwidth 35 MHz, Center Frequency 634.5 MHz, Insertion Loss 1.8 to 2.2 dB, Rejection 65 to 20 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-634.500-35000-1109-TR can be seen below.