The 1CSX506-20 from Werbel Microwave is a Directional Coupler with Frequency 500 MHz to 6 GHz, Coupling 20 dB, Coupling Variation ±0.8 dB, Directivity 18 dB, Average Power 25 to 50 W. Tags: Module with Connectors. More details for 1CSX506-20 can be seen below.