1N5279B/TR

Single Zener Diodes Overview

The Microchip Technology 1N5279B/TR is a 0.5 W glass axial-lead Zener diode in the DO-35 package, featuring a nominal voltage of 180 V with ±5% tolerance (suffix B). It operates from -65°C to +175°C and includes a tape-and-reel option indicated by the TR suffix. Key electrical parameters include a maximum reverse current of 100 nA at 137 V, a Zener impedance of 2200 Ohms at IZT, and a temperature coefficient of +0.110 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for durability
• Regulates voltage across a broad operating current and temperature range
• Minimal capacitance characteristics suitable for high-frequency applications
• Inherently radiation hard per MicroNote 050

Single Zener Diodes Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage sources in measurement equipment

Single Zener Diodes Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the tape-and-reel packaging format as specified in the datasheet. Confirm the 'B' suffix indicates the required ±5% voltage tolerance. Ensure the component meets RoHS compliance requirements if applicable, noting that 'e3' suffixes denote RoHS compliant devices within this series.

Single Zener Diodes Selection Notes

Select this component when a precise 180 V reference is needed with tight ±5% tolerance. The DO-35 package supports through-hole mounting, while the TR suffix facilitates automated assembly processes. Consider the high Zener impedance and positive temperature coefficient when designing circuits requiring stable performance over wide thermal variations.

Single Zener Diodes Part Context

This device belongs to the 1N5221 thru 1N5281B series of 0.5 W Zener Voltage Regulators. The series provides a selection from 2.4 to 200 volts in standard 5% or 10% tolerances. These glass axial-leaded DO-35 Zeners are JEDEC registered and offer flexible axial-lead mounting terminals.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers: 1N5279, 1N5279BE3, 1N5279B-1, 1N5279B-1/TR.