The DDH 40100512 from Quantic TRM is a Dual Directional Coupler with Coupling 20 to 40 dB, Coupling Variation ± 0.5 dB, Frequency 100 to 512 MHz, Average Power 150 W, Insertion Loss 0.2 dB. Tags: Module with Connectors. More details for DDH 40100512 can be seen below.