The MC78M12BDTRKG is an Linear voltage regulators manufactured by ON Semiconductor. It is a 12V, 500mA positive voltage regulator device that provides excellent line and load regulation over a wide range of input and output voltages. The device features an adjustable output voltage which is controlled by an external feedback voltage source, making it an ideal solution for designing efficient, low-power designs. It also features thermal overload protection and short-circuit protection, making it a very reliable device for a wide range of applications. It is a stable voltage regulator with an operating temperature range of -40°C to +125°C and a maximum junction temperature rating of +150°C .