BC817-25, manufactured by LGE, is an NPN transistor in a SOT-23 package that is RoHS-compliant. It has a low switching and saturation voltage and is suitable for use in digital, analog, and switching circuits. Features include a collector-emitter voltage of 30V, a continuous collector current of 500mA, and a transition frequency of 300MHz. The device is suitable for a wide range of applications, including switching, audio amplification, and power management.