The TSC4N18F1G69NS0B1T from TAIYO YUDEN (U.S.A.) Inc is a Directional Coupler with Frequency 699 to 2690 MHz, Coupling 17.1 to 29.5 dB, Directivity 18 dB, Insertion Loss 0.25 to 0.38 dB, VSWR Input 1.20:1. Tags: Surface Mount. More details for TSC4N18F1G69NS0B1T can be seen below.