The SGFCF20S-D from Sumitomo Electric Device Innovations is a RF Transistor with Frequency DC to 3.7 GHz, Power 41 dBm, Power(W) 12.59 W, Saturated Power 43 to 44 dBm, Power Gain (Gp) 18 to 19 dB. Tags: Surface Mount. More details for SGFCF20S-D can be seen below.