The RCPL-300-3000M-10d-S3-50W-s3 from Raditek is a Directional Coupler with Frequency 300 to 3000 MHz, Coupling 10 to 30 dB, Coupling Variation ±1 dB, Average Power 50 W, Insertion Loss 0.6 to 0.7 dB. Tags: Module with Connectors. More details for RCPL-300-3000M-10d-S3-50W-s3 can be seen below.