2SD381 Transistor
Audio frequency power amplifier

2SD424 Transistor
Power amplifier Application
Complementary to 2SB554

2SD667 Transistor
Si-N Uni, 120V, 1A, 140MHz
Complementary pair with 2SB647/A

2SD716 NPN Silicon Power Transistors
Power amplifier applications
omplementary to 2SB686
Recommended for 30~30W high-fidelity frequency amplifier output stage

2SD756A Tranistor
Low frequency high voltage amplifier