The UTC431 is an integrated circuit with existing voltage references made by Youwang Electronics, features a TO-92 package, and is RoHS compliant. It is an adjustable series voltage regulator with an operating input voltage range of 2.5V to 18V and an output voltage range of 2.5V to 38V. The UTC431 has a high current capability of 100mA and a low on-state resistance of 4mO, making it particularly suitable for current-limiting applications. It has a wide range of protection features such as over voltage, thermal, and reverse polarity protection. Additionally, the UTC431 requires a minimum operating temperature of -40°C to +85°C, suitable for a wide variety of applications.