The FLM5053-4F from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 5.0 to 5.3 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) 9.5 to 10.5 dB. Tags: Flanged. More details for FLM5053-4F can be seen below.