The TH0402A Series from Sainty-Tech Communications Limited is a RF & Microwave Circulator with Frequency 0.35 to 0.55 GHz, Bandwidth 10%, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -15 to 60 Degree C. Tags: Drop-in Circulator. More details for TH0402A Series can be seen below.