The EMA8J2830P20J82D from ECHO Microwave is a Band Pass Filter with Frequency 2.82 to 2.84 GHz, Insertion Loss 5 dB, Rejection 7 to 82 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J2830P20J82D can be seen below.