The JCD0400T0500G6 from JQL Electronics is a RF & Microwave Circulator with Frequency 400 to 500 MHz, Average Power Forward 50 W, Insertion Loss 0.6 dB, Isolation 18 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for JCD0400T0500G6 can be seen below.