The EMA4C1230P140C20A1 from ECHO Microwave is a Band Pass Filter with Frequency 1.16 to 1.3 GHz, Insertion Loss 1.2 dB, Rejection 20 dB, Return Loss 10 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4C1230P140C20A1 can be seen below.