The FAT1820N5S from Yantel Corporation is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 20 dB, Power 2 W, Attenuation Accuracy ±1.2 dB, Operating Temperature -55 to 125 Dergee C. Tags: Module with Connectors. More details for FAT1820N5S can be seen below.