The PDC-20-1BD from Mini Circuits is a Bi-Directional Coupler with Frequency 0.5 to 200 MHz, Coupling 19.29 to 19.56 dB, Average Power 3 to 5 W, Power 3 to 5 W, Insertion Loss 0.21 to 0.34 dB. Tags: Surface Mount. More details for PDC-20-1BD can be seen below.