The BZT52B3V9 is a Zener diode, produced by Formosa, and is supplied in a SOD-123 (Surface-Mounted Device) package. It is compliant with RoHS standards, meaning it is an environmentally friendly product. The diode has an operating temperature range of -55 to +125 °C and a maximum working power of 500mW. It has a breakdown voltage of 3V with a tolerance of ±5%. It also has a maximum reverse leakage current of 250uA at a rated voltage of 3V. The device is suitable for applications such as electronic circuits, surge protection, and voltage regulation.