The EMA8F2550P100C40D from ECHO Microwave is a Band Pass Filter with Frequency 2.5 to 2.6 GHz, Insertion Loss 1.5 dB, Rejection 40 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F2550P100C40D can be seen below.