1N4980US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4980US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 82 V. It operates at a test current of 15 mA and features a maximum dynamic impedance of 80 Ohms at the test point, rising to 720 Ohms near the knee current. The device supports a maximum continuous current of 58.0 mA and handles an 8.3 ms square wave surge current of 1.8 A. It dissipates up to 5 Watts at a case temperature of 140°C, with 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 qualified to MIL-PRF-19500/356 standards
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability military applications where failure cannot be tolerated
• Voltage regulation in harsh environments requiring radiation hardness
• Surface mount circuits needing robust glass-encapsulated regulators

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required voltage tolerance and package type. Confirm compliance with MIL-PRF-19500/356 if military qualification is mandatory. Check for RoHS status and ensure the supplier provides valid traceability documentation for the hermetic seal integrity.

Single Zener Diodes Selection Notes

Select this component when a 5-watt surface mount Zener diode with military-grade reliability is required. Ensure the circuit design accommodates the 82 V breakdown voltage and the 58 mA maximum continuous current limit. Consider the 7°C/W thermal resistance for heat dissipation calculations in enclosed spaces.

Single Zener Diodes Part Context

This device belongs to the 1N4954US through 1N4996US series of 5-watt Zener regulators. These components are designed for surface mount technology using the SQ-MELF (D-5B) package. The series offers a wide range of voltage options from 3.3 V to 390 V, all sharing the same hermetic glass construction and military qualification profile.

Single Zener Diodes Replacement Considerations

JAN1N4980CUS/TR

Single Zener Diodes FAQ

Is the 1N4980US/TR radiation hard?

Yes, the datasheet states the device is inherently radiation hard as described in Microsemi MicroNote 050.

What is the maximum operating temperature?

The maximum operating junction temperature is +175°C.