The IS-044050-X9 from Spectrum Elektrotechnik GmbH is a RF & Microwave Isolator with Frequency 4.4 to 5 GHz, Average Power Forward 5 W, Average Power Reverse 1 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Drop-In Isolator. More details for IS-044050-X9 can be seen below.