1N4976US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4976US/TR is a surface-mount Zener voltage regulator with a nominal breakdown voltage of 56 V and a maximum power dissipation of 5 W. It operates within a junction temperature range of -65°C to +175°C. The device features a dynamic impedance of 35 Ohms at the test current of 20 mA, a maximum reverse leakage current of 2 µA at 42.6 V, and a forward voltage of 1.5 V at 1 A. It utilizes a voidless hermetically sealed glass package.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability
• Military qualification per MIL-PRF-19500/356 standard
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace and defense systems
• Critical military electronic circuits
• Harsh environment voltage regulation

Single Zener Diodes Procurement Notes

Verify that the ordering suffix /TR indicates tape and reel packaging as specified in the datasheet mechanical section. Confirm the manufacturer designation aligns with Microchip or its predecessor Microsemi Scottsdale Division documentation. Ensure compliance with the specific military qualification standards referenced in the official component data sheet.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust surface-mount voltage regulation under extreme thermal conditions. The wide operating temperature range supports demanding environments. Verify that the 5 W power rating and 56 V breakdown voltage match the circuit requirements before integration into the design.

Single Zener Diodes Part Context

This part belongs to the industry-recognized 1N4954US through 1N4996US series of 5 Watt Zener Voltage Regulators. These components are designed for scenarios where failure cannot be tolerated, offering extensive voltage selections from 3.3 to 390 volts with standard 5% tolerances.

Single Zener Diodes Replacement Considerations

Axial-leaded equivalents such as 1N4976 are available by deleting the US suffix. Other variants within the 1N4954US through 1N4996US series offer different voltage ratings.