The TH401A Series from Sainty-Tech Communications Limited is a RF & Microwave Circulator with Frequency 3.5 to 8 GHz, Bandwidth 10%, Insertion Loss 0.4 dB, Isolation 23 dB, Operating Temperature -40 to 70 Degree C. Tags: Coaxial Circulator. More details for TH401A Series can be seen below.