The SDHA193199AB from Sangshin is a RF & Microwave Circulator with Frequency 1930 to 1990 MHz, Average Power Forward 175 W, Insertion Loss 0.18 to 0.22 dB, Isolation 22 to 26 dB, Return Loss 22 to 26 dB. Tags: Drop-in Circulator. More details for SDHA193199AB can be seen below.