The QDI3546X from Qualwave is a RF & Microwave Isolator with Frequency 300 to 1850 MHz, Bandwidth 500 MHz, Average Power Forward 300 W, Average Power Reverse 100 W, Insertion Loss 0.25 to 0.7 dB. Tags: Drop-In, Drop-In Isolator. More details for QDI3546X can be seen below.