1N5253A (DO-35)

Single Zener Diodes Overview

The Microsemi Corporation 1N5253A is a silicon Zener diode housed in a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. It provides a nominal Zener voltage of 25V with a standard tolerance of plus or minus 10%, indicated by the 'A' suffix. The device operates at a test current of 5.0 mA and dissipates up to 0.5 watts at 25°C, derating linearly above this temperature. Maximum reverse leakage current is specified at 50 µA under 20V reverse bias.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental stability
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge (ESD)
• Minimal capacitance characteristics

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage generation in electronic circuits
• Overvoltage protection applications

Single Zener Diodes Procurement Notes

Verify that the ordering prefix matches the required screening level, as prefixes such as MQ, MX, MV, or MSP indicate specific military qualifications like JAN or JANTXV when combined with the -1 suffix. Confirm compliance requirements, noting that RoHS compliant versions require the e3 suffix. Ensure the base part number corresponds to the desired voltage tolerance, where A denotes 10% and B denotes 5%. Check datasheet specifications for thermal resistance and power derating curves relevant to your mounting configuration.

Single Zener Diodes Selection Notes

Select the 1N5253A for applications requiring a stable 25V reference within the JEDEC registered series. Consider the DO-35 package for through-hole mounting flexibility. Evaluate the positive temperature coefficient of +0.089 %/°C for thermal stability needs. Verify that the maximum reverse current and impedance values meet circuit sensitivity requirements compared to tighter tolerance variants.

Single Zener Diodes Part Context

This component belongs to the popular 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators manufactured by Microsemi's Scottsdale Division. The series offers an extensive selection from 2.4 to 200 volts in standard tolerances. These devices are JEDEC registered and available in various military screening levels and surface mount equivalents.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5253B for tighter 5% tolerance or the 1N5253E3 for RoHS compliance. Surface mount alternatives are available in the MLL5253 series using the DO-213AA MELF package.