The EMA5G540P25F30DL from ECHO Microwave is a Band Pass Filter with Frequency 527.5 to 552.5 MHz, Insertion Loss 3.5 dB, Rejection 30 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA5G540P25F30DL can be seen below.