The CU4S0401AT-1445-00 from TDK is a RF & Microwave Isolator with Frequency 1.4279 to 1.4629 GHz, Bandwidth 35 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 CU4S0401AT-1445-00 can be seen below.