The CU4S0401BT-1882-00 from TDK is a RF & Microwave Isolator with Frequency 1.85 to 1.915 GHz, Bandwidth 65 MHz, Average Power Forward 2.5 W, Average Power Reverse 0.6 W, Insertion Loss 0.7 dB. Tags: Surface Mount, Surface Mount Isolator. More details for CU4S0401BT-1882-00 can be seen below.