The EMA6E1747P75D30B from ECHO Microwave is a Band Pass Filter with Frequency 1.71 to 1.79 GHz, Insertion Loss 2 dB, Rejection 30 dB @ 1670 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA6E1747P75D30B can be seen below.