The FSU01LG from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 2 GHz, Power Gain (Gp) 19 dB, Noise Figure 0.5 dB, Supply Voltage 3 to 6 V, Voltage - Drain-Source (Vdss) 3 to 6 V. Tags: Flanged. More details for FSU01LG can be seen below.