The EMA8J947P25G30D from ECHO Microwave is a Band Pass Filter with Frequency 935 to 960 MHz, Insertion Loss 3.5 dB, Rejection 30 dB @ 915 to 925 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J947P25G30D can be seen below.