The CU4S0401BT-2355-00 from TDK is a RF & Microwave Isolator with Frequency 2.35 to 2.36 GHz, Bandwidth 10 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-2355-00 can be seen below.