1N5520

Overview

The Microchip Technology 1N5520A is a single silicon Zener diode housed in the DO-204AH (DO-35) axial through-hole package. It features a nominal Zener voltage of 3.9 V with a tolerance of ±10%. The device supports a maximum DC power dissipation of 500 mW at +50°C, with a derating factor of 4 mW/°C above this temperature. Electrical characteristics include a maximum reverse leakage current of 1 µA at 900 mV and a forward voltage of 1.1 V at 200 mA. The component operates within a junction and storage temperature range of -65°C to +175°C.

Feature Summary

• Double plug construction for enhanced structural integrity
• Metallurgically bonded junctions ensuring reliability
• Hermetically sealed glass package for environmental protection

Applications

• Voltage regulation circuits
• Reference voltage generation
• Overvoltage protection systems

Procurement Notes

Verify the specific suffix against official datasheets, as variations such as -1 or /TR indicate distinct packaging or qualification standards. Confirm RoHS compliance status, as standard commercial versions may differ from military-grade JAN variants. Cross-reference the manufacturer part number with authorized distributor catalogs to ensure authenticity and traceability before procurement.

Selection Notes

Select the 1N5520A variant when a 3.9 V reference is required in an axial leaded format. Ensure the application environment stays within the specified -65°C to +175°C operating range. Consider the 500 mW power dissipation limit and apply appropriate derating for ambient temperatures exceeding +50°C to maintain device longevity and performance stability.

Part Context

This component belongs to the 1N55xx series of Zener diodes manufactured by Microchip Technology. The series utilizes double plug construction and metallurgical bonding techniques. These devices are designed for general-purpose voltage regulation and reference applications, offering low noise and low reverse leakage characteristics suitable for precision analog circuits.

Replacement Considerations

Public confirmed substitute part numbers: 1N5520A-1, JAN1N5520DUR-1.