The EMA8J1747P75D35B from ECHO Microwave is a Band Pass Filter with Frequency 1.71 to 1.79 GHz, Insertion Loss 2 dB, Rejection 35 dB @ 1670 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J1747P75D35B can be seen below.