1N5281B-1

Single Zener Diodes Overview

The 1N5281B-1 is a Zener diode manufactured by Microchip Technology, belonging to the 1N5221 through 1N5281B series of 0.5-watt voltage regulators. It features a silicon junction housed in a hermetically sealed glass axial-leaded DO-35 (DO-204AH) package. The device provides a nominal Zener voltage of 200V with a standard tolerance of 5%. It operates within a temperature range of -65°C to 175°C and supports military screening levels via specific prefix identifiers.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction for environmental protection
• Military screening availability through designated prefix identifiers
• Standard JEDEC registration for the 1N5221 to 1N5281B series

Single Zener Diodes Applications

• Voltage regulation in high-reliability circuits
• Reference voltage sources in aerospace systems
• Overvoltage protection in harsh environments

Single Zener Diodes Procurement Notes

Verify the presence of required military prefix identifiers if specific screening levels are mandated for the application. Confirm that the DO-35 package dimensions align with the design constraints. Ensure compliance with relevant export control classifications such as EAR99. Check for RoHS status variations depending on the specific manufacturing lot or suffix.

Single Zener Diodes Selection Notes

Select this component when a precise 200V regulation point is required in a compact axial package. The 5% tolerance suits applications needing moderate precision without tighter binning costs. Consider the hermetic seal for long-term stability in extreme temperatures compared to non-sealed alternatives.

Single Zener Diodes Part Context

This part is part of the widely used 1N5221 to 1N5281B series, offering a broad selection of voltages from 2.4V to 200V. The 'B' suffix typically denotes the 5% tolerance variant. The '-1' suffix often indicates a specific military or screened version within the Microchip portfolio, distinguishing it from commercial equivalents.

Single Zener Diodes Replacement Considerations

MX1N5281B-1E3TR is a documented equivalent offering similar electrical characteristics in a compatible package.