The EMA6F1177P40D50D from ECHO Microwave is a Band Pass Filter with Frequency 1.16 to 1.2 GHz, Insertion Loss 1.89 dB, Rejection 50 dB @ 1100 MHz, Return Loss 13 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA6F1177P40D50D can be seen below.