The JCD0380T0400G15 from JQL Electronics is a RF & Microwave Circulator with Frequency 380 to 400 MHz, Average Power Forward 150 W, Insertion Loss 0.25 dB, Isolation 25 dB, Operating Temperature -30 to 60 Degree C. Tags: Drop-in Circulator. More details for JCD0380T0400G15 can be seen below.