1N5267BUR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N5267BUR-1/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 75 V and a maximum power dissipation of 0.5 W. It utilizes a hermetically sealed DO-213AA (MELF) package featuring an internal metallurgical bond. The device exhibits a test current of 1.7 mA, a maximum reverse leakage current of 100 nA at 43 V, and a dynamic impedance of 270 Ohms. Operating temperatures range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF package with internal metallurgical bond for high reliability.
• Surface mount equivalent to the JEDEC registered 1N5221 through 1N5281 series.
• Inherently radiation hard per Microsemi documentation.
• Non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges.
• High-reliability applications requiring radiation hardness.
• Circuits requiring minimal capacitance characteristics.

Single Zener Diodes Procurement Notes

Verify that the TR suffix indicates tape and reel packaging per EIA-481-B standards. Confirm RoHS compliance status as commercial versions are available while others may not be. Ensure the specific tolerance level matches design requirements, as the 'B' suffix denotes 5% tolerance. Validate thermal derating curves against actual board mounting conditions on FR4 substrates.

Single Zener Diodes Selection Notes

Select this component when a ruggedized surface mount solution is required for voltages near 75 V. The DO-213AA package provides a direct footprint alternative to axial leads without sacrificing hermetic sealing. Consider the positive temperature coefficient inherent to Zener voltages above approximately 5 V when designing precision reference circuits.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series, which serves as the surface mount counterpart to the legacy axial-leaded 1N5221 through 1N5281 diodes. The series covers a wide voltage range from 2.4 V to 200 V in a standardized metallurgically bonded glass configuration.

Single Zener Diodes Replacement Considerations

The 1N5267B-1 is the axial leaded equivalent within the same product family. Verify pinout compatibility and thermal resistance differences when transitioning between the DO-213AA surface mount and DO-35 axial packages.

Single Zener Diodes FAQ

What does the 'TR' suffix indicate for this part number?

The 'TR' suffix indicates that the device is supplied in tape and reel packaging according to EIA-481-B standards.

Is the 1N5267BUR-1 radiation hard?

Yes, the device is inherently radiation hard per Microsemi MicroNote 050.