The EMA8J1250P5N20D from ECHO Microwave is a Band Pass Filter with Frequency 1.24 to 1.25 GHz, Insertion Loss 7 dB, Rejection 20 to 70 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J1250P5N20D can be seen below.