The PRO-DIR 380-520-OD-20 dB from Amphenol Procom is a Directional Coupler with Frequency 380 to 520 MHz, Coupling 20 dB, Coupling Variation ±1 dB, Power 100 W, Average Power 100 W. Tags: Module with Connectors. More details for PRO-DIR 380-520-OD-20 dB can be seen below.