A649 / D669 Transistor Pair – High-performance complementary NPN/PNP transistor set, ideal for use in audio amplifier circuits and power stages.

• Model: A649 (PNP) and D669 (NPN)
• Applications: Audio driver stages, class AB amplifiers, power supplies, signal amplification
• Package: TO-126
• Voltage Rating: Up to 120V (D669), 120V (A649)
• Current Rating: Up to 1.5A
• Power Dissipation: Up to 12.5W (with heat sink)
• Complementary Pair: Designed to work together in push-pull configurations

These transistors are perfect for medium power audio amplification and are commonly found in high-fidelity amplifier circuits. Their matched characteristics ensure excellent linearity and thermal stability.