The EMA4D1455P100C30D from ECHO Microwave is a Band Pass Filter with Frequency 1.41 to 1.51 GHz, Insertion Loss 1.4 dB, Rejection 30 dB @ 1320 MHz, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D1455P100C30D can be seen below.