The 2SA684 is a high-voltage, high-speed PNP silicon transistor designed for various general-purpose amplifier and switching applications. This transistor is capable of handling a maximum collector-base voltage of 160V and a collector current of 1A, making it suitable for a wide range of voltage and current requirements. The 2SA684 is housed in a TO-126 package, allowing for easy integration into a variety of circuit designs. With its fast switching speed and high voltage capability, this transistor is ideal for use in power supply circuits, audio amplifiers, and motor control applications. This product is designed to operate in a wide temperature range, allowing for reliable performance in various environmental conditions. The 2SA684 is a versatile and reliable component that offers high performance for a range of applications, making it a popular choice for design engineers seeking a high-voltage, high-speed PNP transistor solution.