The FLM3135-4F from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 3.1 to 3.5 GHz, Power 35.5 to 36.5 dBm, Power(W) 3.55 to 4.47 W, P1dB 35.5 to 36.5 dBm, Power Gain (Gp) 11 to 12 dB. Tags: Flanged. More details for FLM3135-4F can be seen below.