The ZFDC-20-3-75+ from Mini Circuits is a Directional Coupler with Frequency 10 to 250 MHz, Coupling 19.36 to 19.73 dB, Directivity 32.56 to 54.4 dB, Power 1 to 2 W, Average Power 1 to 2 W. Tags: Module with Connectors. More details for ZFDC-20-3-75+ can be seen below.