The TH0401A Series from Sainty-Tech Communications Limited is a RF & Microwave Circulator with Frequency 0.4 to 0.6 GHz, Bandwidth 10%, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -15 to 60 Degree C. Tags: Coaxial Circulator. More details for TH0401A Series can be seen below.