1N5528D/TR

Overview

The Microchip Technology 1N5528D/TR is a single Zener diode designed for voltage regulation applications. It features an 8.2 V nominal Zener voltage with a tight ±1% tolerance, ensuring high precision in sensitive circuits. The device operates within the DO-204AH (DO-35) axial through-hole package and supports a maximum power dissipation of 500 mW. It maintains a wide operating temperature range from -65°C to +175°C junction temperature. Key electrical characteristics include a maximum reverse leakage current of 500 nA at 7.5 V and a Zener impedance of 100 Ohms. The component is supplied in tape and reel packaging for automated assembly processes.

Feature Summary

• Provides precise voltage regulation with ±1% tolerance on the 8.2 V Zener voltage specification.
• Capable of handling up to 500 mW of power dissipation in a standard axial leaded package.
• Engineered for extended reliability across a broad industrial temperature range up to 175°C.

Applications

• Precision voltage reference circuits requiring low tolerance drift
• Over-voltage protection stages in electronic systems
• Clamping applications in signal conditioning paths

Procurement Notes

Verify that the specific suffix /TR indicates tape and reel packaging rather than bulk supply when planning automated surface mount or through-hole insertion lines. Confirm RoHS compliance status as historical data suggests potential non-compliance for certain variants in this series. Ensure the procurement channel provides valid traceability documentation for aerospace or military grade requirements if applicable to the JAN variant lineage.

Selection Notes

Select this component when strict voltage accuracy is required, as the D suffix denotes a tighter tolerance compared to standard B or C variants. Consider the 100 Ohm impedance value for dynamic load regulation performance. Evaluate the thermal management capabilities given the 500 mW limit and ensure the PCB layout supports adequate heat dissipation for continuous operation near maximum ratings.

Part Context

This part belongs to the 1N55xx series of glass-passivated Zener diodes manufactured by Microchip Technology. The series is widely recognized for its robustness in harsh environments. The 1N5528 designation specifically targets the 8.2 V breakdown voltage segment. The /TR suffix differentiates it from bulk-packaged equivalents by specifying reel-based delivery for high-volume manufacturing efficiency.

Replacement Considerations

Direct parameter-equivalent substitutes include the 1N5528D without the reel suffix for manual assembly contexts. Cross-brand replacements must match the 8.2 V nominal voltage, ±1% tolerance, 500 mW power rating, and DO-35 package footprint to maintain circuit integrity.