1N4129UR

Single Zener Diodes Overview

The Microchip Technology 1N4129UR is a Zener voltage regulator diode designed for surface-mount applications. It utilizes the DO-213AA (SMB) package and features a metallurgically bonded glass construction, indicated by the -1 suffix in related part numbers within the same series. The device provides a nominal Zener voltage of 62V with a maximum power dissipation of 500mW. It operates within a temperature range of -65°C to +175°C junction temperature. Key electrical characteristics include a Zener impedance of 500 Ohms and a reverse leakage current of 10nA at 47.1V.

Single Zener Diodes Feature Summary

• Metallurgically bonded internal construction for enhanced reliability
• Surface-mount compatible DO-213AA package design
• Extended high-temperature operational capability up to 175°C

Single Zener Diodes Applications

• Voltage regulation in harsh environment electronics
• Reference voltage sources in precision circuits
• Over-voltage protection in industrial systems

Single Zener Diodes Procurement Notes

Verify the exact suffix configuration when ordering, as the base number may refer to non-bonded variants. Confirm RoHS compliance status, as military-grade or specific industrial variants often carry N-RoHS markings. Ensure the DO-213AA footprint matches the PCB layout requirements. Cross-reference datasheet revisions to confirm parameter stability before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select this component when a robust surface-mount Zener diode is required for high-reliability applications. The metallurgical bond offers superior mechanical stability compared to standard epoxy encapsulated devices. Consider the 500mW power rating and 62V breakdown voltage against circuit load requirements. Evaluate the 500 Ohm impedance for noise sensitivity in the target application environment.

Single Zener Diodes Part Context

This component belongs to the 1N4099 through 1N4135 series of 0.5-watt Zener regulators. The UR-1 designation typically denotes the surface-mount DO-213AA package with an internal metallurgical bond option. This series serves as the SMD equivalent to traditional axial-leaded JEDEC registered parts, facilitating automated assembly while maintaining ruggedized performance standards.

Single Zener Diodes Replacement Considerations

Direct substitutes include JAN1N4129UR-1 and JANS1N4129UR-1 for qualified military versions. Standard commercial equivalents like 1N4129-1 are available but differ in package type (DO-35 axial). Verify pinout compatibility and thermal resistance differences when transitioning between axial and surface-mount form factors.