The FAT1801N5S from Yantel Corporation is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 1 dB, Power 2 W, Attenuation Accuracy ±0.4 dB, Operating Temperature -55 to 125 Dergee C. Tags: Module with Connectors. More details for FAT1801N5S can be seen below.