The SDI-3343 from Sierra Microwave Technology is a RF & Microwave Isolator with Frequency 3.3 to 4.3 GHz, Average Power Forward 4 W, Peak Power Forward 200 W, Insertion Loss 0.5 dB, Isolation 18 dB. Tags: Drop-In, Drop-In Isolator. More details for SDI-3343 can be seen below.