1N4976CUS/TR

Single Zener Diodes Overview

The Microchip Technology 1N4976CUS/TR is a surface mount Zener voltage regulator diode with a nominal breakdown voltage of 56 V. It operates within a test current range of 20 mA to 84 mA and features a maximum dynamic impedance of 35 Ohms at the knee current. The device is rated for 5 Watts power dissipation and includes a standard 5% voltage tolerance. It utilizes a voidless hermetically sealed glass package with an internal metallurgical bond, designed for high-reliability applications.

Single Zener Diodes Feature Summary

• Military qualified to MIL-PRF-19500/356 standards
• Hermetically sealed voidless-glass construction
• Internal Category I metallurgical bonds
• Robust construction resistant to ESD

Single Zener Diodes Applications

• High-reliability aerospace systems
• Defense electronics requiring failure intolerance
• Radiation-hardened circuit designs
• Precision voltage regulation in extreme environments

Single Zener Diodes Procurement Notes

Verify that the specific suffix 'CUS' corresponds to the required tighter tolerance or variant specifications, as standard parts may differ. Confirm military qualification status and RoHS compliance requirements against project constraints. Ensure the tape and reel packaging matches the automated assembly equipment specifications before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a 56 V reference is required in a surface mount form factor. Consider the 5 Watt power rating and thermal resistance characteristics for heat dissipation planning. Evaluate the 35 Ohm dynamic impedance for noise sensitivity requirements. Verify that the operating temperature range meets the environmental conditions of the target application.

Single Zener Diodes Part Context

This part belongs to the 1N4954US through 1N4996US series of 5 Watt Zener diodes manufactured by Microsemi (now Microchip). These devices are characterized by their voidless hermetically sealed glass packages and internal metallurgical bonds. The series provides a wide selection of voltages from 3.3 V to 390 V with various tolerance options.

Single Zener Diodes Replacement Considerations

Axial-leaded equivalents such as 1N4976 are available by removing the US suffix. Other variants within the 1N4954US to 1N4996US series offer different voltage ratings but share similar package and reliability characteristics.