The QDC3234A from Qualwave is a RF & Microwave Circulator with Frequency 2000 to 4000 MHz, Bandwidth 2000 MHz, Average Power Forward 10 to 100 W, Insertion Loss 0.6 dB, Isolation 16 dB. Tags: Drop-In, Drop-in Circulator. More details for QDC3234A can be seen below.