The U 491 DICWH from Southern Microwave Inc is a RF & Microwave Isolator with Frequency 470 to 512 MHz, Average Power Forward 300 W, Average Power Reverse 100 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for U 491 DICWH can be seen below.