The EMA8J1261P103F50D from ECHO Microwave is a Band Pass Filter with Frequency 1.21 to 1.31 GHz, Insertion Loss 3 dB, Rejection 3 to 70 dB, Return Loss 18 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J1261P103F50D can be seen below.