1N4971/TR

Single Zener Diodes Overview

The Microchip Technology 1N4971/TR is a military-qualified, voidless hermetically sealed 5-watt glass Zener diode. It provides a nominal Zener voltage of 36 V at a test current of 30 mA with a standard tolerance of ±5%. The device features an axial lead 'E' package and operates within a junction temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 2 µA at 27.4 V, a dynamic impedance of 11 Ω at the test current, and a continuous current rating of 132 mA. It supports surge currents up to 4.5 A for 8.3 ms square waves.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability
• Military qualification compliant with MIL-PRF-19500/356 standards
• Inherently radiation hard design suitable for harsh environments
• Triple-layer passivation and robust mechanical packaging

Single Zener Diodes Applications

• High-reliability aerospace and defense circuits
• Voltage regulation in extreme temperature environments
• Critical power supply reference applications where failure is not tolerated

Single Zener Diodes Procurement Notes

Verify that the component matches the specific Microchip Technology part number 1N4971/TR. Confirm the package style is the axial lead 'E' configuration and ensure the supplier provides documentation verifying compliance with MIL-PRF-19500/356. Check for any specific lot traceability requirements necessary for your application's quality standards.

Single Zener Diodes Selection Notes

Select this component when a 36 V regulation point is required in a high-power 5 W dissipation scenario. Ensure the operating environment stays within the specified -65°C to +175°C junction temperature range. Consider the axial lead form factor for through-hole mounting if surface mount alternatives are unsuitable for the mechanical constraints.

Single Zener Diodes Part Context

This component belongs to the industry-recognized 1N4954 through 1N4996 series of 5-watt Zener voltage regulators. Manufactured by Microchip Technology (formerly Microsemi Scottsdale Division), these devices are designed for applications requiring robust performance and long-term stability under rigorous operational conditions.

Single Zener Diodes Replacement Considerations

Surface-mount equivalents are available in the 1N4954US through 1N4996US series. Verify pinout compatibility and thermal management requirements when substituting axial leads with MELF packages.