1N4989 [Microchip]

This Zener Voltage Regulator series is military qualified to MIL-PRF-19500/356 and is ideal for high-reliability applications where a failure cannot be tolerated. These industry-recognized 5 Watt Zener Voltage Regulators are hermetically sealed with voidless-glass construction using an internal metallurgical bond. It includes Zener selections from 3.3 to 390 volts in standard 5% tolerances as well as tighter tolerances identified by different suffix letters on the part number. They are also available in surface-mount packages. The series features popular JEDEC registered parts, voidless hermetically sealed glass package, extremely robust construction, triple-layer passivation, and internal metallurgical bonds. They are available in axial-lead packages and surface-mount equivalents. The devices are non-sensitive to ESD and inherently radiation hard.