The BZT52C4V3 is a Zener diode SOD-123 RoHS component manufactured by Bourne. It is a low-power, low-impedance diode designed to provide stable, temperature-sensitive reverse-biased voltage regulation. The diode has a 4.3 V Zener voltage rating and a power supply voltage range of 4 to 22 V. The SOD-123 package has pins for easy soldering, making it ideal for application in circuit boards. It is RoHS compliant, meaning it does not contain certain hazardous materials such as lead, mercury, and cadmium. The diode is suitable for use in automobile electronics, consumer electronics, and other industrial applications.