1N4996

Single Zener Diodes Overview

The Microchip Technology 1N4996 is a military-qualified, voidless hermetically sealed glass Zener diode rated for 5 watts of power dissipation. It provides a nominal Zener voltage of 390 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features an axial lead (E package) configuration. Key electrical parameters include a test current of 3 mA, a maximum reverse leakage current of 2 µA at 325 V, and a dynamic impedance of 1.8 kΩ at the test current.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using voidless hard glass with tungsten slugs and internal metallurgical bonds.
• Military qualification compliant with MIL-PRF-19500/356 standards for high-reliability applications.
• Inherently radiation hard as described in Microsemi MicroNote 050.
• ESD nonsensitive per MIL-STD-750 Method 1020.

Single Zener Diodes Applications

• High-reliability aerospace systems where failure cannot be tolerated.
• Military electronic circuits requiring robust voltage regulation.
• Radiation-hardened environments utilizing specific component selections.

Single Zener Diodes Procurement Notes

Verify that the ordered part number matches the exact suffix requirements for your application, as different suffixes indicate variations in tolerance or packaging. Confirm compliance with specific military standards such as MIL-PRF-19500/356 if required by your system specifications. Ensure proper handling procedures are followed due to the hermetic nature of the component.

Single Zener Diodes Selection Notes

Select the 1N4996 when a precise 390 V regulation point is needed in high-power scenarios up to 5 Watts. Consider this component for designs operating in extreme temperatures between -65°C and +175°C. Verify that the axial lead form factor fits your board layout constraints compared to surface-mount alternatives like the US suffix variants.

Single Zener Diodes Part Context

This component belongs to the 1N4954 through 1N4996 series of 5 Watt Zener Voltage Regulators manufactured by Microsemi (now Microchip Technology). These devices share common mechanical and electrical characteristics, differing primarily in their nominal Zener voltage ratings which span from 3.3 V to 390 V. They are designed for use in demanding industrial and defense sectors.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in square end-cap MELF configurations with the 'US' suffix, specifically the 1N4996US. Cross-reference with other manufacturers offering MIL-PRF-19500/356 qualified parts if supply chain diversification is necessary.