Microchip Technology CDLL4972 Zener Diode. This high-reliability component is a 1N4972 series Zener diode, designed for precise voltage regulation. Encased in a durable glass hermetic package, it offers exceptional stability and performance across a wide operating temperature range. The CDLL4972 is ideal for applications requiring robust voltage clamping and reference, commonly found in aerospace, defense, and high-reliability industrial systems. Its bulk packaging ensures efficient integration into high-volume manufacturing processes.