1N5268BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5268BUR-1 is a 0.5 W Zener voltage regulator in a hermetically sealed DO-213AA (SOD80/MLL34) surface mount package. It provides an 82 V nominal Zener voltage with a ±5% tolerance at a test current of 1.5 mA. The device features a maximum reverse leakage current of 0.1 µA and a dynamic impedance of 330 Ohms at the test point. Operating temperatures range from -65°C to +175°C, with a positive temperature coefficient of +0.098 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass surface mount package with internal metallurgical bond
• Surface mount equivalent of JEDEC registered 1N5221 thru 1N5281 series
• Inherently radiation hard per Microsemi specifications
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability aerospace and defense systems requiring radiation hardness
• Surface mount circuit designs replacing axial-leaded equivalents

Single Zener Diodes Procurement Notes

Verify the specific suffix letters on the part number to confirm voltage tolerance requirements, as tighter tolerances utilize different designations. Confirm RoHS compliance status if required, noting that compliant versions are available for commercial grade only. Ensure sourcing channels provide documentation regarding MIL-PRF-19500 screening options if military-grade reliability is necessary for the application.

Single Zener Diodes Selection Notes

Select this component when a ruggedized surface mount solution is needed for high-voltage regulation up to 200 V. The DO-213AA package offers a direct footprint replacement for traditional axial diodes while maintaining hermetic sealing. Consider the thermal resistance characteristics and derating curves when designing for high ambient temperatures or limited board space.

Single Zener Diodes Part Context

This device belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of metallurgically bonded glass surface mount Zeners. The series covers a wide voltage range from 2.4 V to 200 V, providing designers with extensive selection options within a single standardized package family. These components serve as robust alternatives to standard plastic-packaged diodes in demanding environments.

Single Zener Diodes Replacement Considerations

Direct parameter-equivalent replacements include other manufacturers' DO-213AA packaged Zeners rated at 82 V with 500 mW power dissipation. Verify pinout polarity and physical dimensions match the DO-213AA footprint before substitution.