1N4984US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4984US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 120 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 maximum reverse leakage current of 2 µA at 91.2 V. Electrical characteristics include a dynamic impedance of 170 Ohms at the test current of 10 mA, a forward voltage of 1.5 V at 1 A, and a thermal resistance of 7°C/W from junction to end cap.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability
• Military qualification compliant with MIL-PRF-19500/356 standards
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace systems
• Military electronic equipment
• Critical voltage regulation circuits where failure is not tolerated

Single Zener Diodes Procurement Notes

Verify that the specific part number includes the /TR suffix to confirm tape and reel packaging availability. Confirm compliance with RoHS directives as this series may be non-compliant. Ensure the ordering suffix matches the required tolerance level, as tighter tolerances require specific letters such as C or D. Validate military qualification requirements against the final assembly site documentation.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust surface mount voltage regulation in extreme environments. The 5 W power rating supports significant current handling compared to smaller packages. Consider the 170 Ohm dynamic impedance when designing for precise voltage stability under varying load conditions. Verify that the operating temperature range aligns with the system's thermal profile.

Single Zener Diodes Part Context

This device belongs to the 1N4954US through 1N4996US series of surface mount Zener diodes manufactured by Microsemi (now Microchip). These components are designed for demanding industrial and defense sectors. The series utilizes an E-package (D-5B) form factor, providing a compact footprint while maintaining high power capabilities through its glass encapsulation technology.

Single Zener Diodes Replacement Considerations

JAN1N4984CUS

Single Zener Diodes FAQ

What is the maximum continuous current rating for the 1N4984US?

The maximum continuous regulator current (IZM) is 39.5 mA.

How is polarity indicated on the package?

Polarity is indicated by a band on the cathode end of the device.