1N5279B-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N5279B-1/TR is a military-grade single Zener diode designed for through-hole mounting in the DO-204AH (DO-35) axial package. It features a nominal Zener voltage of 180 V with a tolerance of ±5% and a maximum power dissipation of 500 mW. The device exhibits a maximum Zener impedance of 2200 Ohms and a reverse leakage current of 100 nA at 137 V. It operates within a temperature range of -65°C to +175°C and complies with MIL-PRF-19500/437 qualification standards.

Single Zener Diodes Feature Summary

• Military-grade reliability compliant with MIL-PRF-19500/437
• High thermal stability across extended temperature ranges
• Precision voltage regulation with tight tolerance

Single Zener Diodes Applications

• Military aerospace electronic systems
• High-reliability voltage reference circuits
• Harsh environment protection networks

Single Zener Diodes Procurement Notes

Verify that the specific suffix indicates tape and reel packaging rather than bulk, as this affects handling procedures. Confirm the presence of the full military qualification marking on the component body. Ensure the supplier provides traceability documentation required for defense contracts. Check for any recent PCN notices regarding assembly site changes or material substitutions.

Single Zener Diodes Selection Notes

Select this component when strict adherence to military specifications is mandatory for the application. The high impedance value requires consideration in circuit design to ensure proper regulation under load. Verify that the 500 mW power rating aligns with the expected thermal dissipation in the final enclosure. Compare against standard commercial equivalents only if military certification is not a project requirement.

Single Zener Diodes Part Context

This part belongs to the 1N5279B series of Zener diodes manufactured by Microchip Technology. The 'B' suffix typically denotes a tighter voltage tolerance compared to standard variants. The '-1' suffix often indicates military grade or specific screening levels. The '/TR' suffix specifies the tape and reel packaging format for automated assembly processes.

Single Zener Diodes Replacement Considerations

Parametric equivalent JAN1N5279B-1 is available from Microchip Technology. Standard commercial versions like 1N5279 may lack the required military qualification and screening. Verify pinout compatibility before substitution.