The BP0EA0420A7 from KYOCERA AVX is a Band Pass Filter with Frequency 0.309 to 0.520 GHz, Center Frequency 0.420 GHz, Insertion Loss 2 dB, Rejection 30 to 40 dB, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Ceramic Filter. More details for BP0EA0420A7 can be seen below.