The MA-520/XB-2.5 from Microwave Devices Inc. is a Fixed Attenuator with Frequency DC to 2.5 GHz, Attenuation 1 to 40 dB, Power 20 W, Peak Power 500 W, Attenuation Accuracy ±0.5 dB. Tags: Module with Connectors. More details for MA-520/XB-2.5 can be seen below.