The SMA2Z3.9A is a high-quality 3.9V, 2W Zener diode from JSCJ (JCET), designed for precise voltage regulation and circuit protection. As an authorized distributor of electronic components, Supreme Components International offers this reliable diode in a compact SMA package. This Zener diode is perfect for applications requiring stable voltage references, surge suppression, and overvoltage protection. Its 2W power dissipation capability allows it to handle significant current loads. The SMA package ensures easy mounting and efficient heat dissipation. Trust Supreme Components International for genuine components and excellent service. This diode is commonly used in power supplies, communication equipment, and industrial control systems.