The CFADC4020U5 from Cernex Inc is a Fixed Attenuator with Frequency DC to 40 GHz, Attenuation 20±1.25 dB, Power 0.5 W, Attenuation Accuracy ±1.25 dB. Tags: Module with Connectors, Module with Connectors. More details for CFADC4020U5 can be seen below.