The EMA8F1747P75D50D from ECHO Microwave is a Band Pass Filter with Frequency 1.71 to 1.79 GHz, Insertion Loss 2 dB, Rejection 50 dB @ 2110 to 2170 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F1747P75D50D can be seen below.