The JID0420T0490KM10A3 from JQL Electronics is a RF & Microwave Isolator with Frequency 420 to 490 MHz, Average Power Forward 100 W, Average Power Reverse 100 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for JID0420T0490KM10A3 can be seen below.