1N5270BUR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N5270BUR-1/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 91 V. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 0.5 W. The device features a metallurgically bonded glass DO-213AA (MELF) package, offering hermetic sealing. Electrical characteristics include a maximum reverse leakage current of 0.1 µA at the specified voltage, a dynamic impedance of 400 Ohms at the test current of 1.4 mA, and a positive temperature coefficient of 0.099 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed surface mount package with internal metallurgical bond
• Surface mount equivalent of JEDEC registered axial-leaded series
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability aerospace and defense electronics
• Harsh environment circuit protection

Single Zener Diodes Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm tolerance levels and RoHS compliance status. Confirm that the TR suffix indicates tape and reel packaging per EIA-481-B standards. Ensure procurement channels provide documentation for MIL-PRF-19500 screening if required by the application specifications.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability applications. The 91 V rating suits circuits needing precise voltage reference or clamping in the medium-voltage range. Consider the low capacitance and radiation hardness for sensitive environments where standard commercial packages may fail.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 W Zener regulators. It serves as the surface mount counterpart to the traditional axial-leaded 1N5270 devices. The series covers a wide voltage spectrum from 2.4 V to 200 V, providing designers with standardized options for various regulation needs in compact form factors.

Single Zener Diodes Replacement Considerations

Direct replacements include other manufacturers' DO-213AA MELF Zener diodes rated at 91 V with similar power dissipation. Verify pinout compatibility and thermal resistance values. Axial equivalents like the 1N5270 exist but require different mounting considerations.