Microchip Technology CD989B is a Zener Diode, identified as a single Zener diode component. This device is supplied in Tape & Reel (TR) packaging, suitable for high-volume automated assembly processes. The CD989B functions as a voltage regulator, providing a stable reference voltage critical for power supply regulation and voltage clamping applications in various electronic systems. Its robust construction and reliable performance make it a staple in industrial control, automotive electronics, and telecommunications infrastructure. This component offers precise voltage regulation characteristics essential for maintaining system integrity under fluctuating input conditions.