1N4729AUR

Overview

The Microchip Technology 1N4729AUR is a hermetically sealed silicon Zener diode designed for high-reliability applications. It features a MELF-2 (DO-213AB) glass package with unidirectional polarity and isolated case connection. The device provides a nominal Zener voltage of 3.6V with a tolerance of 5% and a power dissipation rating of 1W. It operates within a temperature range suitable for demanding environments, ensuring stable voltage regulation in critical circuits.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• High reliability design for critical electronic systems
• Unidirectional voltage regulation capability

Applications

• Voltage reference circuits requiring high stability
• Overvoltage protection in sensitive electronics
• Clipping and clamping applications in signal processing

Procurement Notes

Verify the specific suffix 'AUR' against the manufacturer's current datasheet to confirm availability and exact electrical tolerances. Ensure compliance with RoHS directives if required by the end application, as indicated in official documentation. Cross-reference the DO-213AB package dimensions with PCB layout requirements before finalizing procurement decisions.

Selection Notes

Select this component when hermetic sealing and high reliability are mandatory for the circuit environment. The 1W power rating and 3.6V Zener voltage define its operational limits. Consider the MELF-2 package form factor for surface mount assembly needs where space constraints and thermal performance are balanced.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. The 'AUR' suffix typically denotes a specific tape-and-reel packaging option or quality grade within the company's discrete semiconductor portfolio. It serves as a robust alternative to standard plastic-packaged regulators in aerospace and military contexts.

Replacement Considerations

Direct substitutes include other hermetically sealed 1N4729 variants from manufacturers like Motorola/NXP or Vishay, provided they meet the same 3.6V, 1W, and DO-213AB/MELF specifications. Verify pinout compatibility and thermal characteristics before substitution.