2SC2073 Transistor
High Power, High Voltage, General Purpose.Silicon, NPN, 25W, 150V, 150V, 5V, 1.5A, 150

2SC2021 Transistor
General Small Signal Amp.

2SC1980 Transistor
For high breakdown voltage low-noise amplification
Complementary to 2SA0921

2SC1973 Tranistor

2SC1972 Tranistor
175MHz520MHz,15W