The SGFCF15S-D from Sumitomo Electric Device Innovations is a RF Transistor with Frequency DC to 3.7 GHz, Power 39.5 dBm, Power(W) 8.91 W, Saturated Power 41.5 to 42.5 dBm, Power Gain (Gp) 18.5 to 19.5 dB. Tags: Surface Mount. More details for SGFCF15S-D can be seen below.