JANS1N4979CUS/TR

Single Zener Diodes Overview

The JANS1N4979CUS/TR is a single silicon Zener diode manufactured by Microchip Technology, designed for high-reliability applications. It features a nominal Zener voltage of 75 V with a tight tolerance of ±2%. The device is rated for a maximum power dissipation of 5 W and operates within an extended temperature range from -65°C to +175°C. Packaged in a surface-mount SQ configuration (D-5B-2), it is qualified under the JANS standard for space applications.

Single Zener Diodes Feature Summary

• JANS qualification ensures suitability for space-grade environments
• High thermal stability across extreme operating temperatures
• Tight voltage tolerance for precise regulation

Single Zener Diodes Applications

• Spacecraft power supply regulation
• Satellite electronic systems
• High-reliability aerospace circuits

Single Zener Diodes Procurement Notes

Verify that the specific suffix CUS/TR corresponds to the required JANS qualification level and tape-and-reel packaging format. Confirm that the ±2% tolerance meets the design specifications, as this differs from standard commercial variants. Ensure the supplier provides appropriate documentation for space-grade components.

Single Zener Diodes Selection Notes

Select this component when strict JANS radiation hardness and reliability standards are mandatory. The ±2% tolerance offers higher precision than standard 5% variants. Consider the surface-mount package constraints and ensure the PCB footprint matches the D-5B-2 specification for proper assembly.

Single Zener Diodes Part Context

This part belongs to the 1N4979 series of Zener diodes produced by Microchip Technology. While sharing the base 1N4979 electrical characteristics, the JANS1N4979CUS/TR variant is specifically processed and tested to meet JANS requirements for space electronics, distinguishing it from commercial or military JAN versions.

Single Zener Diodes Replacement Considerations

Direct substitutes include other JANS-qualified 75V 5W Zener diodes from Microchip, such as JANS1N4979C or JANS1N4979CUS, provided they match the specific tolerance and package requirements.