The MGF4921AM from Mitsubishi Electric US, Inc. is a RF Transistor with Frequency 2.4 to 4 GHz, Gain 13 to 18 dB, Noise Figure 0.35 to 0.55 dB, Supply Voltage 2 V, Storage Temperature -55 to 125 Degree C. Tags: Flanged. More details for MGF4921AM can be seen below.