1N5254A (DO-35)

Single Zener Diodes Overview

The Microsemi 1N5254A is a 0.5 W glass axial-lead Zener diode in the DO-35 package, providing a nominal voltage of 27 V with a ±10% tolerance. It operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 100 μA at 20 V. The device exhibits a zener impedance of 41 Ω at a test current of 4.6 mA and maintains a positive temperature coefficient of +0.090 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental stability
• Inherently radiation hard per MicroNote 050
• Minimal capacitance characteristics suitable for high-frequency applications
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage sources in precision circuits
• Protection against voltage transients in sensitive electronics

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required JEDEC registration and suffix designation. Confirm compliance with RoHS requirements if applicable by checking for the e3 suffix. Ensure the ordering prefix aligns with any necessary military screening levels or internal bond options specified in the design documentation.

Single Zener Diodes Selection Notes

Select this component when a standard 27 V reference with 10% tolerance is required in an axial-lead package. Consider the positive temperature coefficient for thermal compensation needs. Evaluate the power derating curve to ensure adequate heat dissipation at elevated ambient temperatures above 50°C.

Single Zener Diodes Part Context

This device belongs to the popular 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators. The series offers a wide selection from 2.4 to 200 volts in standard 5% or 10% tolerances. Tighter tolerances are available via different suffix letters on the part number.

Single Zener Diodes Replacement Considerations

Equivalent surface mount versions are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package. Other manufacturers may offer direct replacements within the same JEDEC type numbering system.