JANS1N4979US

Single Zener Diodes Overview

The JANS1N4979US is a single Zener diode manufactured by Microchip Technology, designed for high-reliability applications. It features a nominal Zener voltage of 75 V with a tolerance of ±5%. The device supports a maximum power dissipation of 5 W and operates within an extended temperature range from -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 2 µA at 56 V and a Zener impedance of 55 Ohms. It utilizes a D-5B-2 surface-mount package and meets the stringent requirements of MIL-PRF-19500/356 for space-grade environments.

Single Zener Diodes Feature Summary

• Certified to MIL-PRF-19500/356 standards for space-grade reliability
• Operates in extreme temperatures ranging from -65°C to +175°C
• Provides stable voltage regulation with low leakage current
• Utilizes a compact surface-mount D-5B-2 package

Single Zener Diodes Applications

• Spacecraft power supply regulation systems
• Satellite electronic circuit protection
• High-reliability military avionics voltage reference
• Harsh environment industrial control circuits

Single Zener Diodes Procurement Notes

Verify that the component carries the official JANS designation, indicating compliance with MIL-PRF-19500/356 for space applications. Confirm the package type is D-5B-2 and check for manufacturer lot traceability documentation. Ensure the supplier provides valid certification for radiation hardness and material compliance required for aerospace procurement processes.

Single Zener Diodes Selection Notes

Select this component when a 75 V regulation point is required in space-constrained designs needing high thermal stability. The D-5B-2 package suits automated surface-mount assembly. Consider the 5 W power rating for thermal management needs. Verify that the ±5% voltage tolerance aligns with the specific circuit precision requirements for the intended application.

Single Zener Diodes Part Context

This part belongs to the 1N4979 series of Zener diodes produced by Microchip Technology. The JANS suffix specifically denotes a version qualified for space flight according to military specifications. It shares core electrical parameters with standard commercial variants but undergoes rigorous screening and testing protocols to ensure performance in vacuum and radiation environments typical of orbital missions.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 75 V Zener voltage, 5 W power rating, and D-5B-2 package. Verify if the alternative component holds equivalent MIL-PRF-19500/356 certification for space use. Cross-reference thermal coefficients and leakage currents to ensure compatibility with existing circuit designs without modification.