The MJ802G MJ802 802 is a 100V 30A 200W transistor, Use for as an output device in complementary audio amplifiers to 100−Watts music power per channel.
The 2SC458 is a 30V 100mA NPN (BJT) manufactured in a plastic TO92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are from left to right the emitter, collector, and base leads.
The IRFP054 is a 55V 80A 240W Third generation Power MOSFETs from Vishay provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and cost-effectiveness.