The TCD-20-4-75+ from Mini Circuits is a Directional Coupler with Frequency 40 MHz to 1.2 GHz, Coupling 18.51 to 21.64 dB, Directivity 17.52 to 34.93 dB, Power 1 W, Average Power 1 W. Tags: Surface Mount. More details for TCD-20-4-75+ can be seen below.