1N5254A

Single Zener Diodes Overview

The Microchip Technology 1N5254A is a single Zener diode housed in a DO-7 glass axial-lead package. It provides a nominal Zener voltage of 27 V with a 10% tolerance at a test current of 4.6 mA. The device supports a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 41 Ohms, and a positive voltage temperature coefficient of 0.09 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features hermetically sealed glass axial-lead construction for durability
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific suffix letter on the component marking to confirm the exact voltage tolerance class. Ensure the procurement documentation specifies the required screening level if military standards are mandated. Confirm that the package type matches the design requirements for through-hole mounting. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Single Zener Diodes Selection Notes

Select this component when a precise 27 V reference is required in a low-power application. The 500 mW rating suits circuits where thermal management is limited. Consider the positive temperature coefficient for designs sensitive to thermal drift. Verify that the 41 Ohm impedance meets the dynamic performance needs of the load regulation requirements.

Single Zener Diodes Part Context

This part belongs to the JEDEC registered 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers a wide selection of voltages from 2.4 V to 200 V. Variations in tolerance are indicated by suffix letters such as A for 10% or B for 5%. The manufacturer also provides surface mount equivalents and options for military screening prefixes.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. For higher reliability requirements, variants with internal bonds and military prefixes like MX or MQ are available.