The SGN21C050MK from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 2.14 GHz, Power 44 dBm, Power(W) 25.12 W, Saturated Power 46 to 47 dBm, Power Gain (Gp) 17.5 to 18.5 dB. Tags: Flanged. More details for SGN21C050MK can be seen below.