The FAC1804 from Yantel Corporation is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 4 dB, Power 0.2 W, Attenuation Accuracy ±0.5 to ±1 dB, Operating Temperature -55 to 150 Degree C. Tags: Chip, Ceramic, Surface Mount. More details for FAC1804 can be seen below.