The RCPL-500-1000M-20dB-S(f)-50W-z4 from Raditek is a Directional Coupler with Frequency 500 to 1000 MHz, Coupling 20 dB, Coupling Variation ±1.2 dB, Directivity 20 dB, Average Power 50 W. Tags: Module with Connectors. More details for RCPL-500-1000M-20dB-S(f)-50W-z4 can be seen below.