The CU4S0506BT-860-00 from TDK is a RF & Microwave Isolator with Frequency 852 to 869 MHz, Bandwidth 17 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-860-00 can be seen below.