The VZ40D621K Zener diode, manufactured by World Products Inc, is a crucial component for voltage regulation and circuit protection. Available through Supreme Components International, an authorized distributor, this single Zener diode features a 21V reverse breakdown voltage with a ±5% tolerance, ensuring reliable performance. Encased in a compact DO-214AC (SMA) surface mount package, it's well-suited for automated assembly processes. With a power dissipation of 500mW, the VZ40D621K provides effective voltage clamping and transient voltage suppression. Its precise voltage characteristics make it ideal for applications requiring stable voltage references, such as power supplies, signal conditioning circuits, and overvoltage protection circuits. This diode offers a robust and space-saving solution for modern electronic designs.