1N5529C

Overview

The Microchip Technology 1N5529C is a single silicon Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 9.1V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500mW at ambient temperatures up to 75°C, derating linearly above this threshold. It operates within a junction temperature range of -65°C to +175°C and utilizes the DO-204AH (DO-35) axial leaded glass package. Key electrical parameters include a test current of 5mA and a maximum reverse leakage current of 1µA at the rated voltage.

Feature Summary

• Provides stable voltage regulation in low-power circuits using avalanche breakdown characteristics
• Constructed with hermetically sealed glass encapsulation for environmental protection
• Capable of operating at elevated junction temperatures up to 175°C

Applications

• Voltage reference sources in precision measurement equipment
• Overvoltage protection circuits for sensitive semiconductor inputs
• Clamping applications in signal conditioning stages

Procurement Notes

Verify the specific suffix (e.g., /TR for tape and reel) against the required packaging format. Confirm RoHS compliance status as standard versions may contain lead. Ensure the DO-35 footprint matches the PCB design. Cross-reference datasheet revisions to confirm thermal derating curves match system requirements.

Selection Notes

Select based on the required Zener voltage accuracy and power dissipation limits. Consider the dynamic impedance at the operating current point for regulation stability. Evaluate the thermal resistance of the DO-35 package relative to the expected current load. Verify that the reverse leakage current specifications meet the noise or offset requirements of the application.

Part Context

This component belongs to the standard 1N55xx series of low-voltage Zener diodes manufactured by Microchip Technology. These devices are widely used in general-purpose electronics for basic voltage regulation tasks. The series offers various voltage options from 2.4V to 75V in the same axial package form factor.

Replacement Considerations

Equivalent parts include the 1N5529B (±2% tolerance) or 1N5529D (±1% tolerance) from Microchip for tighter voltage accuracy. Other manufacturers such as Vishay or Nexperia offer compatible 1N5529 variants in DO-35 packages with similar electrical ratings.