The FAT1840S5S from Yantel Corporation is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 40 dB, Power 5 W, Attenuation Accuracy ±1.5 dB, Operating Temperature -55 to 125 Dergee C. Tags: Module with Connectors. More details for FAT1840S5S can be seen below.