Zener diode arrays consist of multiple Zener diodes integrated into a single package. These arrays provide a compact and versatile solution for applications requiring multiple stable voltage references. Diode arrays simplify circuit design and save space on printed circuit boards (PCBs), making them ideal for electronic systems with limited real estate. Zener diode arrays are commonly used in voltage regulation circuits, signal conditioning, and various analog and digital applications where maintaining multiple voltage levels is essential.