The FAC4304 from Yantel Corporation is a Fixed Attenuator with Frequency DC to 43.5 GHz, Attenuation 4 dB, Power 1 to 1.7 W, Attenuation Accuracy ±0.1 to ±0.4 dB, Operating Temperature -45 to 85 Degree C. Tags: Die, Chip, Surface Mount. More details for FAC4304 can be seen below.