The K847PH is a surface-mount NPN Darlington transistor from Vishay. It has an robust construction and low power consumption, making it ideal for a range of industrial applications, including the control of power supplies, lamps and LEDs. Features include a high current gain of 500, a maximum collector current of 1A, and a maximum collector-emitter voltage of 50V. It also has a maximum power dissipation of 500mW, and a storage temperature range of -65°C to +150°C.