The EMA4C1747P75D25B from ECHO Microwave is a Band Pass Filter with Frequency 1.71 to 1.79 GHz, Insertion Loss 2 dB, Rejection 5 to 35 dB, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4C1747P75D25B can be seen below.