The EMA8F430P17E30D from ECHO Microwave is a Band Pass Filter with Frequency 421.5 to 438.5 MHz, Insertion Loss 2.5 dB, Rejection 30 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F430P17E30D can be seen below.