The EDA4H4250P500D40 from ECHO Microwave is a Band Pass Filter with Frequency 4 to 4.5 GHz, Insertion Loss 1.5 dB, Rejection 40 dB @ DC to 3600MHz, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4H4250P500D40 can be seen below.