The 2N2640 is a silicon unijunction transistor (UJT) manufactured by Central Semiconductor. Supreme Components International is an authorized distributor of Central Semiconductor components, ensuring you receive genuine and high-quality products. This UJT, packaged in a TO-18 case, is a three-terminal device exhibiting unique switching characteristics. It's commonly used in relaxation oscillators, trigger circuits, and timing applications. The 2N2640 offers stable performance and predictable behavior, making it a reliable choice for various electronic designs. Its key features include a low peak point current and a stable valley point voltage. Consider the 2N2640 for your next project requiring a robust and dependable UJT.