1N5279B-1

Single Zener Diodes Overview

The Microchip Technology 1N5279B-1 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 180 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C TJ. Key electrical characteristics include a maximum reverse leakage current of 100 nA at 137 V and a Zener impedance of 2200 Ohms. It utilizes a DO-204AH (DO-35) axial through-hole package.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at high voltage levels up to 180 V
• Capable of operation in extended industrial temperature environments
• Constructed in a standard axial leaded package for through-hole mounting

Single Zener Diodes Applications

• High-voltage reference circuits
• Overvoltage protection stages
• Voltage clamping applications

Single Zener Diodes Procurement Notes

Verify the specific suffix '-1' against official Microchip documentation to confirm packaging or testing variations, as suffixes may indicate distinct handling or lot specifications. Ensure the required Zener voltage and power dissipation align with circuit design constraints before procurement. Cross-reference the DO-204AH package dimensions with PCB footprint requirements to guarantee mechanical compatibility during assembly.

Single Zener Diodes Selection Notes

Select this component when a precise 180 V regulation point is required with tight tolerance. Consider the high Zener impedance value, which may impact dynamic performance in low-current applications. Evaluate the thermal management needs given the 500 mW power rating and ensure the operating environment stays within the specified junction temperature limits for reliable long-term operation.

Single Zener Diodes Part Context

This part belongs to the Microchip 1N52xx series of Zener diodes, widely used for general-purpose voltage regulation. The 1N5279B variant specifically targets higher voltage ranges compared to lower-voltage counterparts in the same family. It serves as a fundamental discrete semiconductor component for stabilizing voltages in analog and digital circuits requiring robust regulation capabilities.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitutes include the 1N5279 and 1N5279BE3 from Microchip Technology. These equivalents share identical electrical parameters and package styles, allowing for direct pin-for-pin replacement in existing designs without modifying the circuit layout.