The EMA6E1842P75E30D from ECHO Microwave is a Band Pass Filter with Frequency 1.81 to 1.88 GHz, Insertion Loss 2.5 dB, Rejection 10 to 30 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA6E1842P75E30D can be seen below.