The EMA6F3000P400B30D from ECHO Microwave is a Band Pass Filter with Frequency 2.8 to 3.2 GHz, Insertion Loss 0.8 dB, Rejection 30 dB @ 2600 MHz, Return Loss 13 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA6F3000P400B30D can be seen below.