The PDC-418-20-50W-SFF from Quantic PMI (Planar Monolithics) is a Directional Coupler with Frequency 4 to 18 GHz, Coupling 20 dB, Directivity 12 dB, Average Power 2(Reflected) to 50 W(Incident), Insertion Loss 0.7 dB. Tags: Module with Connectors. More details for PDC-418-20-50W-SFF can be seen below.