The FLM3742-25F from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 3.7 to 4.2 GHz, Power 43.5 to 44.5 dBm, Power(W) 22.39 to 28.18 W, P1dB 43.5 to 44.5 dBm, Power Gain (Gp) 9.5 to 10.5 dB. Tags: Flanged. More details for FLM3742-25F can be seen below.