The CU4S1001BT-897-00 from TDK is a RF & Microwave Isolator with Frequency 880 to 915 MHz, Bandwidth 35 MHz, Average Power Forward 20 W, Average Power Reverse 1 W, Insertion Loss 0.75 dB. Tags: Surface Mount, Surface Mount Isolator. More details for CU4S1001BT-897-00 can be seen below.