1N5268B

Single Zener Diodes Overview

The Microchip Technology 1N5268B is a 0.5-watt glass axial-lead Zener voltage regulator housed in a DO-35 package. It provides an 82 V nominal breakdown voltage with a standard 5% tolerance, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 100 µA at 50 V. Electrical characteristics include a test current of 1.5 mA, a maximum Zener impedance of 330 Ohms, and a positive voltage temperature coefficient of +0.098 %/°C.

Single Zener Diodes Feature Summary

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

Single Zener Diodes Applications

• Voltage regulation in electronic circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the manufacturer origin, as this component was originally produced by Microsemi (Scottsdale Division) and may be sourced through Microchip Technology or authorized distributors. Confirm that the specific part number matches the JEDEC registered 1N5268B designation with the B suffix for 5% tolerance. Ensure compliance with RoHS requirements if applicable by checking for the e3 suffix variant.

Single Zener Diodes Selection Notes

Select the 1N5268B when a precise 82 V reference is required in a through-hole design. The DO-35 package offers flexible mounting terminals. Consider the positive temperature coefficient for thermal stability analysis. For tighter tolerances, variants with C or D suffixes are available. Surface mount equivalents exist in the MLL5221 to MLL5281B series.

Single Zener Diodes Part Context

This component belongs to the popular 1N5221 thru 1N5281B series of 0.5 watt 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 widely used for general-purpose voltage regulation tasks.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package. DO-7 glass body axial-leaded equivalents are also offered. Verify pinout compatibility and power dissipation ratings when substituting.