1N5278B/TR

Single Zener Diodes Overview

The Microchip Technology 1N5278B/TR is a 0.5 W glass axial-lead Zener diode in the DO-35 package, featuring a nominal voltage of 170 V with ±5% tolerance (suffix B). It operates within a temperature range of -65°C to +175°C and includes a TR suffix for tape-and-reel packaging per EIA-296 standards.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance characteristics suitable for high-frequency applications
• Inherently radiation hard according to MicroNote 050 specifications

Single Zener Diodes Applications

• Voltage regulation circuits requiring high-voltage stability
• Electronic systems exposed to ionizing radiation environments
• Precision reference voltage generation in harsh industrial conditions

Single Zener Diodes Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm compliance with RoHS directives by checking for the 'e3' suffix if lead-free soldering is mandated. Ensure the component meets the necessary military screening levels if applicable to your specific project requirements.

Single Zener Diodes Selection Notes

Select this component when a 170 V breakdown voltage with tight 5% tolerance is required. The DO-35 glass package offers robust thermal performance up to 175°C. Consider the inherent radiation hardness for aerospace or defense applications where standard silicon devices may fail under similar stress conditions.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series provides a wide selection from 2.4 to 200 volts. The 1N5278B specifically targets the higher end of this voltage spectrum, offering reliable performance in compact axial-lead packages.

Single Zener Diodes Replacement Considerations

Consult the manufacturer's datasheet for direct equivalents within the 1N5221-1N5281B series. Verify pinout compatibility and thermal resistance values before substituting with other manufacturers' parts.