The EMA8H2533P20I30D from ECHO Microwave is a Band Pass Filter with Frequency 2.52 to 2.54 GHz, Insertion Loss 4.5 dB, Rejection 30 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8H2533P20I30D can be seen below.