The EMA4B1235P36B10A1 from ECHO Microwave is a Band Pass Filter with Frequency 1.22 to 1.25 GHz, Insertion Loss 1 dB, Rejection 10 to 22 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4B1235P36B10A1 can be seen below.