1N4984

Single Zener Diodes Overview

The Microchip Technology 1N4984 is a military-qualified, voidless hermetically sealed glass Zener diode designed for high-reliability applications. It features a standard nominal Zener voltage of 120 V with a ±5% tolerance and a maximum power dissipation of 5 Watts at a lead temperature of 65°C. The device operates within a junction temperature range of -65°C to +175°C and includes internal Category I metallurgical bonds.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless hard glass package with tungsten slugs
• Internal Category I metallurgical bonds for robust construction
• Triple-layer passivation for enhanced durability
• Inherently radiation hard

Single Zener Diodes Applications

• High-reliability aerospace systems
• Military electronic circuits
• Voltage regulation in extreme environments

Single Zener Diodes Procurement Notes

Verify the specific revision level and manufacturing origin when sourcing this component. Confirm that the axial leads possess the correct tin/lead finish as specified in current documentation, noting that previous inventory may have featured solid silver leads without finish. Ensure compliance with MIL-PRF-19500/356 requirements for intended use cases.

Single Zener Diodes Selection Notes

Select the 1N4984 for designs requiring a 120 V breakdown voltage with standard 5% tolerance. Consider the 5 W power rating and ensure adequate thermal management for operation up to 175°C. Verify if tighter tolerances are required, as suffixes such as C or D indicate 2% or 1% variations respectively.

Single Zener Diodes Part Context

This component belongs to the industry-recognized 1N4954 through 1N4996 series of 5 Watt Zener Voltage Regulators. These devices are widely used in critical infrastructure where failure is not an option. The series offers extensive voltage selections from 3.3 to 390 volts in both through-hole and surface-mount configurations.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N4984CUS and JAN1N4984DUS. Verify mechanical dimensions and termination finishes before substitution.