The 2N2643 is a high-quality Silicon Unijunction Transistor (UJT) manufactured by Central Semiconductor. Supreme Components International is an authorized distributor of Central Semiconductor components, ensuring you receive genuine parts. This UJT is specifically designed for applications requiring stable switching characteristics, such as relaxation oscillators, timing circuits, and triggering circuits. The 2N2643 comes in a TO-18 package, offering a compact and robust solution for your electronic designs. Its key features include low peak point current, stable valley point voltage, and excellent temperature stability. Ideal for both hobbyists and professional engineers, the 2N2643 provides reliable performance in a wide range of applications. Trust Supreme Components International for all your electronic component needs.