The TSD1N18D2G45NS030T from TAIYO YUDEN (U.S.A.) Inc is a Diplexer with Frequency f1 1558 to 1610 MHz / 2400 to 2500 MHz, Frequency f2 4900 to 5950 MHz, Attenuation 24 to 32 dB, Attenuation f1 24 to 26 dB, Attenuation f2 32 dB. Tags: Surface Mount, Ceramic. More details for TSD1N18D2G45NS030T can be seen below.