The DDH 4530512 from Quantic TRM is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ± 0.5 dB, Frequency 30 to 512 MHz, Average Power 500 W, Insertion Loss 0.1 dB. Tags: Module with Connectors. More details for DDH 4530512 can be seen below.