The EMEA15D420P20C30B from ECHO Microwave is a Band Pass Filter with Frequency 410 to 430 MHz, Insertion Loss 1.5 dB, Rejection 30 dB @ 450 to 470MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMEA15D420P20C30B can be seen below.