The KTDI0402-100 from Kete Microwave is a RF & Microwave Isolator with Frequency 0.35 to 0.55 GHz, Bandwidth 40 MHz, Average Power Reverse 100 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for KTDI0402-100 can be seen below.