The TSD1N18B829MLV0D4T from TAIYO YUDEN (U.S.A.) Inc is a Diplexer with Frequency f1 617 to 960 MHz, Frequency f2 1427 to 2690 MHz, Attenuation 17 to 25 dB, Attenuation f1 22 to 25 dB, Attenuation f2 17 dB. Tags: Surface Mount, Ceramic. More details for TSD1N18B829MLV0D4T can be seen below.