1N4981US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4981US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 91 V and a maximum power dissipation of 5 W. It operates within a junction temperature range of -65°C to +175°C. The device features a standard voltage tolerance of ±5% and a test current (IZT) of 15 mA. Maximum dynamic impedance at the test point is 90 Ohms, while reverse leakage current is limited to 2 µA at 69.2 V. The component utilizes a voidless hermetically sealed glass package with copper end caps.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using voidless hard glass with tungsten slugs for high reliability
• Military qualification compliant with MIL-PRF-19500/356 standards
• Internal metallurgical bonds designed to resist ESD per MIL-STD-750 Method 1020
• Inherently radiation hard characteristics suitable for demanding environments

Single Zener Diodes Applications

• High-reliability aerospace systems requiring failure-tolerant components
• Radiation-hardened electronic circuits
• Precision voltage regulation in extreme temperature environments
• Critical military-grade power supply designs

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required tape and reel packaging configuration. Confirm compliance with RoHS directives if applicable to the project requirements. Ensure the supplier provides traceability documentation consistent with military procurement standards. Validate that the received units match the specified JEDEC registration series and package markings.

Single Zener Diodes Selection Notes

Select this component when a 5 W surface mount Zener diode with 91 V regulation is required. Consider the wide operating temperature range for harsh environment applications. Evaluate the need for military qualification versus commercial alternatives based on system reliability targets. Verify that the package dimensions fit the available PCB real estate constraints.

Single Zener Diodes Part Context

This part belongs to the 1N4954US through 1N4996US series of industry-recognized 5 Watt Zener Voltage Regulators. These devices are widely used in applications where robust performance and long-term stability are critical. The series offers extensive voltage selections from 3.3 to 390 volts with various tolerance options.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers include JAN1N4981CUS, JAN1N4981DUS, JAN1N4981US, JANTX1N4981CUS, JANTX1N4981DUS, JANTX1N4981US/TR, and JANTXV1N4981US.