The RFSL2139 from RF-CI is a RF & Microwave Isolator with Frequency 470 to 520 MHz, Average Power Forward 200 W, Average Power Reverse 20 W, Peak Power Forward 1 kW, Insertion Loss 0.3 to 0.4 dB. Tags: Drop-In, Drop-In Isolator. More details for RFSL2139 can be seen below.