The DEA203600BT-1240B2 from TDK is a Band Pass Filter with Frequency 3.3 to 3.9 GHz, Bandwidth 600 MHz, Center Frequency 3.6 GHz, Insertion Loss 1.4 to 2.2 dB, Rejection 10 to 50 dB. Tags: Surface Mount. More details for DEA203600BT-1240B2 can be seen below.