1N5531D/TR

Overview

The 1N5531D/TR is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 11 V with a tight tolerance of ±1%. The device is rated for a maximum power dissipation of 500 mW and operates within an extended junction temperature range from -65°C to +175°C. Packaged in the DO-204AH (DO-35) axial leaded format, it exhibits a maximum reverse leakage current of 50 nA at 9.9 V and a Zener impedance of 80 Ohms.

Feature Summary

• Provides precise voltage regulation with a narrow ±1% tolerance on the 11 V nominal output.
• Capable of operating reliably across an extreme industrial temperature range extending up to +175°C junction temperature.
• Utilizes a standard DO-35 axial through-hole package suitable for general-purpose circuit board mounting.

Applications

• Precision voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in sensitive electronic systems
• General-purpose voltage regulation in industrial control equipment

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm tape-and-reel packaging specifications. Ensure that the required tolerance class matches the ±1% specification detailed in the datasheet. Cross-reference the DO-35 package dimensions with your PCB footprint requirements prior to finalizing procurement decisions.

Selection Notes

Select this component when a highly accurate 11 V reference is needed alongside robust thermal performance. The low leakage current and high temperature rating make it suitable for demanding environments where standard silicon devices might fail. Confirm that the 500 mW power rating aligns with the expected dissipation in your specific circuit topology.

Part Context

This part belongs to Microchip's legacy line of precision Zener diodes, continuing the historical 1N55xx series standards. These components are widely recognized for their reliability in established industrial designs. The TR suffix indicates a specific reel-based packaging configuration intended for automated assembly processes.

Replacement Considerations

Official parameter-equivalent substitutes include the 1N5531D-1 and 1N5531D variants from Microchip Technology. Verify that any alternative source maintains the identical 11 V nominal voltage and ±1% tolerance to ensure circuit compatibility.