The MC0512-20 from Fairview Microwave is a Directional Coupler with Frequency 500 MHz to 12.4 GHz, Coupling 20 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity 1 dB, Directivity 15 dB. Tags: Module with Connectors. More details for MC0512-20 can be seen below.