The JI2D0390T0400MCX from JQL Electronics is a RF & Microwave Isolator with Frequency 390 to 400 MHz, Average Power Forward 100 W, Average Power Reverse 30 W, Insertion Loss 0.5 to 0.6 dB, Isolation 40 dB. Tags: Drop-In, Drop-In Isolator. More details for JI2D0390T0400MCX can be seen below.