JANTX1N4978CUS

Single Zener Diodes Overview

The JANTX1N4978CUS is a 5-watt Zener voltage regulator diode manufactured by Microsemi Corporation. It features a nominal Zener voltage of 68V with a test current of 20mA and a maximum reverse leakage current of 2uA. The device operates within a temperature range of -65°C to +175°C and exhibits a voltage temperature coefficient of 0.1%/°C. Packaged in the D5B axial leaded configuration, it utilizes hermetically sealed voidless-glass construction with an internal metallurgical bond for enhanced reliability.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using voidless-glass technology
• Internal metallurgical bond for structural integrity
• Extended operating temperature range suitable for harsh environments

Single Zener Diodes Applications

• Military aerospace power supply regulation
• High-reliability industrial voltage reference circuits
• Harsh environment electronic protection systems

Single Zener Diodes Procurement Notes

Verify component authenticity through authorized Microchip distribution channels due to military-grade specifications. Confirm package integrity and seal quality upon receipt. Ensure storage conditions maintain environmental stability. Validate datasheet revisions match procurement requirements. Request full traceability documentation for quality assurance compliance.

Single Zener Diodes Selection Notes

Select this component for applications requiring high thermal stability and robust physical construction. The 5W power dissipation rating supports significant current handling capabilities. Verify that the 68V breakdown voltage aligns with circuit design parameters. Consider the axial leaded format for through-hole mounting constraints. Evaluate the extended temperature range against operational environmental demands.

Single Zener Diodes Part Context

This part belongs to the MIL-PRF-19500/435 qualified series of 5-watt Zener diodes. It represents a specialized variant designed for demanding operational conditions where standard commercial components would fail. The JANTX designation indicates specific screening and testing protocols beyond basic commercial standards.

Single Zener Diodes Replacement Considerations

Direct substitutes include JANS1N4978CUS for stricter qualification levels or JANTX1N4978 for non-solderable lead variants. Verify pinout compatibility and thermal management requirements when transitioning between these related part numbers.