The BC857B is a high-quality PNP small signal transistor from Diptronics, supplied by Supreme Components International, an authorized distributor of electronic components. This transistor is designed for general-purpose amplification and switching applications. Encased in a space-saving SOT-23 package, the BC857B is well-suited for high-density circuit boards. Its key features include low noise, high gain, and excellent linearity. This makes it a reliable choice for audio amplifiers, signal processing circuits, and other sensitive applications. Supreme Components International guarantees the authenticity and quality of this Diptronics product.