1N4959US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4959US/TR is a military-qualified, surface-mount Zener voltage regulator with a nominal breakdown voltage of 11 V. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 5 W at an ambient case temperature of 140°C. The device features a test current of 125 mA, a maximum reverse leakage current of 10 µA, and a dynamic impedance of 2.5 Ω. It utilizes a voidless hermetically sealed glass package (D-5B) with copper end caps.

Single Zener Diodes Feature Summary

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

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify the specific revision level and manufacturing origin against the latest official datasheet before integration. Confirm that the ordering suffix matches the required tape-and-reel packaging format. Ensure compliance with all applicable military specifications and material declarations required for your specific procurement contract.

Single Zener Diodes Selection Notes

Select this component when a robust, surface-mount solution is required for critical voltage reference applications. The 5 W power rating supports substantial current handling in compact footprints. Verify thermal derating requirements if operating above the specified case temperature threshold.

Single Zener Diodes Part Context

This part belongs to the industry-recognized 1N4954US through 1N4996US series of 5 Watt Zener Voltage Regulators. These devices are designed for applications 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 are available by removing the US suffix. Other variants within the 1N4954US through 1N4996US series offer different voltage ratings but share identical mechanical and reliability characteristics.