The CU4S0506BT-837-00 from TDK is a RF & Microwave Isolator with Frequency 830 to 845 MHz, Bandwidth 15 MHz, Average Power Forward 5 W, Average Power Reverse 2 W, Insertion Loss 0.75 dB. Tags: Surface Mount, Surface Mount Isolator. More details for CU4S0506BT-837-00 can be seen below.