The EMA4D3300P500D25D from ECHO Microwave is a Band Pass Filter with Frequency 3.05 to 3.55 GHz, Insertion Loss 2 dB, Rejection 25 to 30 dB, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D3300P500D25D can be seen below.