The 120K ohms (1/2 watt) resistor is a high-resistance component rated to handle up to 0.5 watts of power. With a resistance value of 120,000 ohms, it is used in electronic circuits for tasks such as current limiting, voltage division, and impedance matching. Its 1/2-watt power rating ensures it can manage moderate power levels without overheating, making it suitable for applications that require high resistance and reliable performance under moderate power conditions.