The ZDC9-30L20-3000-1952 from COM-MW is a Directional Coupler with Frequency 20 to 3000 MHz, Coupling 29 to 31 dB, Directivity 8 dB, Average Power 20 W, Insertion Loss 0.8 to 1.3 dB. Tags: Surface Mount. More details for ZDC9-30L20-3000-1952 can be seen below.