The PSC18H17S from Nuvotronics, Inc. is a 90 Degree Hybrid Coupler with Frequency 2 to 18 GHz, Average Power 20 W (CW), Insertion Loss 0.75 to 1.1 dB, Isolation 20 to 23 dB, Coupling 3 dB. Tags: Surface Mount. More details for PSC18H17S can be seen below.