The QDI4545X from Qualwave is a RF & Microwave Isolator with Frequency 300 to 1100 MHz, Bandwidth 300 MHz, Average Power Forward 500 W, Average Power Reverse 10 to 100 W, Insertion Loss 0.2 to 0.6 dB. Tags: Drop-In, Drop-In Isolator. More details for QDI4545X can be seen below.