1N4129UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4129UR-1/TR is a glass surface mount Zener voltage regulator with a nominal breakdown voltage of 62 V. It operates within the 1N4099UR through 1N4135UR series and utilizes a hermetically sealed DO-213AA (SOD80/MLL34) MELF package. The device provides a steady-state power dissipation of 0.5 watts at an end cap temperature below 100°C or ambient temperature below 25°C. Electrical characteristics include a maximum Zener impedance of 0.01 Ohms, a reverse current of 40 µA, and a test current of 250 µA. It supports an operating and storage temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA MELF package
• Internal metallurgical bond construction
• Inherently radiation hard design
• ESD nonsensitive per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Voltage regulation in harsh environments
• Radiation-hardened electronic circuits
• Surface mount assembly for compact designs

Single Zener Diodes Procurement Notes

Verify that the specific part number includes the required suffixes for your application requirements. Confirm the presence of the internal metallurgical bond option if military qualification is needed. Ensure the tape and reel packaging matches your automated assembly equipment specifications before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability applications. Consider the 0.5-watt power rating and the wide operating temperature range for thermal management. Verify that the 62 V nominal voltage aligns with circuit design parameters and check tolerance requirements against available suffix options.

Single Zener Diodes Part Context

This device belongs to the 1N4099UR through 1N4135UR series of 0.5-watt glass surface mount Zeners. It serves as a surface mount equivalent to JEDEC registered axial-leaded parts. The series offers voltages from 1.8 to 100 volts with standard 5% tolerances and tighter options via suffix letters.

Single Zener Diodes Replacement Considerations

JEDEC registered 1N4099 through 1N4135 axial-leaded equivalents are available. Surface mount MLL4099 through MLL4135 variants may be considered. RoHS compliant versions exist with the e3 suffix.