1N5525D

Overview

The Microchip Technology 1N5525D is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 6.2 V with a tight tolerance of ±1%. The device operates in the DO-35 (DO-204AH) axial through-hole package and dissipates up to 500 mW of power at +50°C, with derating applied above this threshold. Key electrical characteristics include a maximum dynamic impedance of 30 Ω at a test current of 1 mA and a maximum reverse leakage current of 1 µA. The component supports a wide operating temperature range from -65°C to +175°C junction temperature.

Feature Summary

• Provides precise voltage regulation with a 1% tolerance on the 6.2 V breakdown voltage.
• Features low reverse leakage current to minimize standby power consumption.
• Constructed with double plug design and metallurgically bonded contacts for reliability.
• Capable of operation in extreme environments with a junction temperature range extending to +175°C.

Applications

• Precision voltage reference circuits requiring stable low-voltage rails.
• Overvoltage protection stages in sensitive electronic instrumentation.
• Clamping applications in analog signal processing paths.
• Military and aerospace systems adhering to MIL-PRF-19500/437 standards.

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as 1N5525B or 1N5525C may exhibit different voltage tolerances or leakage specifications despite sharing the base part number. Confirm compliance requirements, noting that standard commercial versions may not meet RoHS directives. Ensure the procurement channel provides original manufacturer documentation to validate the hermetic sealing status if required for harsh environment deployment.

Selection Notes

Select the 1N5525D specifically when a 1% voltage tolerance is mandatory, distinguishing it from lower-cost variants like the 1N5525B which typically offer 5% tolerance. Evaluate the thermal management needs, as the 500 mW dissipation rating requires adequate heat sinking or PCB copper area to maintain junction temperatures within the +175°C limit. Consider the DO-35 package constraints for high-frequency noise performance, as the device is noted for low noise characteristics suitable for precision analog applications.

Part Context

This component belongs to the 1N55xx series of Zener diodes manufactured by Microchip Technology, formerly Microsemi. The series is widely recognized for its use in ruggedized electronics, including military and space-grade equipment. The 1N5525D variant specifically targets applications demanding high stability and low noise, leveraging the company's expertise in silicon planar technology and hermetic glass package construction.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with generic equivalents only after confirming exact matching of the 6.2 V Zener voltage, 1% tolerance, 500 mW power rating, and DO-35 package dimensions.