BZX55C5V1-R0 is a 5.1V 0.5W 5mA single diode Zener diode made by Taiwan Semiconductor. It is a DO35 reel/tape packaged device. It is used as a voltage regulator, particularly in digital circuits, typically as a local regulator for DC-DC converter circuits, acting to regulate a specific voltage level. It is widely used in TV sets, telecommunications, computers, and other electronic appliances. The Zener diode offers a low forward voltage drop of 1V or lower and reverse leakage current rating of 5mA, allowing a single device to be used in various voltage applications. The BZX55C5V1-R0 is integrated with high quality, robust packaging that is resistant to high temperature, humidity and stress.