The FAT1803N5S from Yantel Corporation is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 3 dB, Power 2 W, Attenuation Accuracy ±0.6 dB, Operating Temperature -55 to 125 Dergee C. Tags: Module with Connectors. More details for FAT1803N5S can be seen below.