The TH0301S-100 Series from Sainty-Tech Communications Limited is a RF & Microwave Circulator with Frequency 0.25 to 0.5 GHz, Bandwidth 10%, Insertion Loss 0.8 dB, Isolation 40 dB, Operating Temperature -15 to 60 Degree C. Tags: Coaxial Circulator. More details for TH0301S-100 Series can be seen below.