The NJG1815K75 from Nisshinbo Micro Devices Inc. is a RF Switch with Frequency 1 to 6 GHz, Insertion Loss 0.40 to 0.65 dB, Isolation 23 to 25 dB, P1dB 31 dBm, P1dB 1.25 W. Tags: Surface Mount, Solid State. More details for NJG1815K75 can be seen below.