The NJG1802K51 from Nisshinbo Micro Devices Inc. is a RF Switch with Frequency 0.2 to 6 GHz, Insertion Loss 0.18 to 0.43 dB, Isolation 28 to 50 dB, P1dB 36 dBm, P1dB 3.98 W. Tags: Surface Mount, Solid State. More details for NJG1802K51 can be seen below.