The PCD-20-100-R5N30 from Preferred Power Products (P3) is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±0.5 dB, Frequency 20 to 100 MHz, Average Power 500 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for PCD-20-100-R5N30 can be seen below.