The DC450M100B30C30PS-01 from Dyne Tech is a Directional Coupler with Frequency 400 to 500 MHz, Coupling 30 dB, Coupling Variation ±1.2 dB, Directivity 20 dB, Average Power 30 W. Tags: Module with Connectors. More details for DC450M100B30C30PS-01 can be seen below.