1N4968US

Single Zener Diodes Overview

The Microchip Technology 1N4968US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 27 V. It operates at a test current of 50 mA and features a maximum dynamic impedance of 6 Ohms. The device dissipates 5 Watts of power within an operating temperature range of -65°C to +175°C. It utilizes a hermetically sealed voidless glass package (E Package) with copper end caps and tin/lead terminations.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability
• Military qualification per MIL-PRF-19500/356 suitable for critical applications
• Robust design inherently resistant to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace and defense circuits
• Voltage regulation in extreme temperature environments
• Critical systems where component failure is not tolerated

Single Zener Diodes Procurement Notes

Verify the specific revision level and manufacturing origin when sourcing this component, as historical inventory may feature solid silver end caps instead of the standard tin/lead finish. Confirm compliance with current environmental directives and ensure the supplier provides valid traceability documentation for military-grade parts.

Single Zener Diodes Selection Notes

Select the 1N4968US for designs requiring a 27 V reference in a surface mount footprint. Ensure thermal management accommodates the 5 W dissipation rating and derating requirements above 140°C. Consider the E Package dimensions for PCB layout and verify that the 6 Ohm dynamic impedance meets the circuit's noise and stability specifications.

Single Zener Diodes Part Context

This component belongs to the 1N4954US through 1N4996US series of 5 Watt Zener diodes. These devices are designed for rugged environments and offer a wide selection of voltage ratings from 3.3 V to 390 V. The series is characterized by its voidless glass construction and availability in various tolerance grades including JAN, JANTX, and JANS.

Single Zener Diodes Replacement Considerations

Equivalent axial-leaded versions exist within the same family; consult the separate datasheet for 1N4954 through 1N4996.