The FAC4301 from Yantel Corporation is a Fixed Attenuator with Frequency DC to 43.5 GHz, Attenuation 1 dB, Power 1 to 2 W, Attenuation Accuracy ±0.1 to ±0.4 dB, Operating Temperature -45 to 85 Degree C. Tags: Die, Chip, Surface Mount. More details for FAC4301 can be seen below.