The RFSL2945D-T40 from RF-CI is a RF & Microwave Isolator with Frequency 3.6 to 4.2 GHz, Average Power Forward 50 W, Average Power Reverse 40 W, Peak Power Forward 0.5 kW, Insertion Loss 0.4 to 0.5 dB. Tags: Drop-In, Drop-In Isolator. More details for RFSL2945D-T40 can be seen below.