The NJG1657MD7 from Nisshinbo Micro Devices Inc. is a RF Switch with Frequency 0.05 to 3 GHz, Insertion Loss 0.30 to 0.45 dB, Isolation 24 to 32 dB, P1dB 35 dBm, P1dB 3.16 W. Tags: Surface Mount, Solid State. More details for NJG1657MD7 can be seen below.