The CER0477A from CTS Electronic Components is a Diplexer with Frequency f1 1.92 to 2.17 GHz, Frequency f2 1.71 to 1.88 GHz, Power 2 W, Peak Power 20 W, Attenuation 40 to 43 dB. Tags: Surface Mount, Ceramic, Ceramic. More details for CER0477A can be seen below.