The JID0390T0400KM10 from JQL Electronics is a RF & Microwave Isolator with Frequency 390 to 400 MHz, Average Power Forward 150 W, Average Power Reverse 100 W, Peak Power Forward 0.5 kW, Insertion Loss 0.25 dB. Tags: Drop-In, Drop-In Isolator. More details for JID0390T0400KM10 can be seen below.