The QSDC-20-200-K6-55-NS from Qualwave is a Directional Coupler with Frequency 20 to 200 MHz, Coupling 55±1 dB, Directivity 19 dB, Average Power 600 W, Insertion Loss 0.15 dB. Tags: Module with Connectors. More details for QSDC-20-200-K6-55-NS can be seen below.