The ANO 51-2501-40 from ANOISON Electronics LLC is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 40 dB, Power 25 W, Peak Power 400 W, Attenuation Accuracy +/- 1.0 dB. Tags: Module with Connectors. More details for ANO 51-2501-40 can be seen below.