The EMA6E1290P50E40D from ECHO Microwave is a Band Pass Filter with Frequency 1.27 to 1.32 GHz, Insertion Loss 2.5 dB, Rejection 40 dB @ 1152MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA6E1290P50E40D can be seen below.