1N4734AUR-1

Overview

The Microchip Technology 1N4734AUR-1 is a high-reliability Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 5.6 V with a tolerance of 5% and a power dissipation rating of 1 W. The device utilizes silicon technology housed in the DO-213AB hermetically sealed glass MELF-2 package, ensuring robust performance under demanding conditions. It supports an extended operating temperature range up to 175 °C and maintains a maximum dynamic impedance of 5 Ω.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• High reliability design suitable for critical systems
• Single unidirectional configuration

Applications

• Military aerospace circuits requiring MIL-PRF-19500 compliance
• High-reliability voltage regulation
• Precision voltage references

Procurement Notes

Verify that the specific suffix -1 denotes the correct variant within the Microchip or Microsemi product line, as ordering codes can vary by manufacturer generation. Confirm RoHS status and lead times directly with authorized distributors, as availability may be restricted due to the component's specialized nature. Ensure procurement channels are authorized to guarantee authenticity for high-reliability requirements.

Selection Notes

Select this component when a hermetically sealed, high-reliability Zener diode is required for harsh environments. The 5.6 V output and 1 W power rating make it suitable for stable voltage referencing. Consider the DO-213AB package for surface mount integration where space efficiency and thermal stability are prioritized over through-hole mounting options.

Part Context

This part belongs to the broader 1N4734A series of Zener diodes, which includes various packaging options such as DO-41 axial leads and standard SMD reels. The UR-1 designation specifically identifies the hermetically sealed MELF form factor, distinguishing it from commercial-grade plastic or standard glass axial variants found in the same voltage class.

Replacement Considerations

Equivalent parts include MQ1N4734DPTR and MSP1N4734AURTR, which share identical electrical specifications and high-reliability characteristics. Verify package compatibility and manufacturer-specific screening levels before substitution.