The BZT52C5V1 is a single 4.8V to 5.4V 350mW 5.1V SOD-123 Zener Diode, a type of diode which regulates and maintains a constant voltage level across its terminals, manufactured by Hottech. It complies with RoHS standards, meaning that it does not contain any hazardous materials and is up-to-date with the latest safety standards. The operating temperature ranges from -40C to +125C, making it suitable for use in widely varying environments. The maximum reverse voltage is 5.1 Volts, while the power dissipation is 350mW. Additionally, the minimum breakdown voltage is 4.8V and the maximum breakdown voltage is 5.4V. As such, the BZT52C5V1 is an ideal choice for a wide range of electronics applications.