1N5273BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5273BUR-1 is a surface mount Zener voltage regulator featuring a metallurgically bonded glass DO-213AA (MELF) package. It provides a nominal Zener voltage of 120 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65°C to +175°C, dissipating up to 0.5 W at an end cap temperature below 125°C. Electrical characteristics include a test current of 1.0 mA, a maximum reverse leakage current of 4000 µA, and a dynamic impedance of 900 Ω.

Single Zener Diodes Feature Summary

• Hermetically sealed surface mount package with internal metallurgical bond
• Inherently radiation hard per Microsemi specifications
• Non-sensitive to electrostatic discharge
• Minimal capacitance across operating ranges

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability aerospace and defense circuits
• Harsh environment electronics requiring radiation hardness

Single Zener Diodes Procurement Notes

Verify the specific suffix letters on the part number to confirm the exact voltage tolerance required for the application. Confirm whether RoHS compliance is necessary, as commercial versions are available in compliant configurations while military-grade screening options may differ. Ensure the ordering nomenclature matches the desired reliability level and packaging format before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount equivalent to the axial 1N5273B is required. The 1N5273BUR-1 offers a robust metallurgical bond suitable for high-vibration environments. Consider the 120 V breakdown point and the specific thermal derating requirements outlined in the datasheet graphs to ensure stable operation under varying ambient conditions.

Single Zener Diodes Part Context

This device belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 watt Zener voltage regulators. The series covers a wide voltage range from 2.4 V to 200 V in a single surface mount form factor. These parts serve as direct replacements for the popular JEDEC registered 1N5221 to 1N5281 series, maintaining similar electrical performance in a compact MELF-style package.

Single Zener Diodes Replacement Considerations

The 1N5273B is the axial leaded equivalent. Verify that the PCB footprint supports the DO-213AA package dimensions.