1N4779A

Overview

The 1N4779A is a temperature compensated Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 8.5 V with a tight tolerance of +/- 0.05%. The device operates at a test current of 2 mA and dissipates up to 500 mW. It utilizes a DO-35 axial through-hole package, supporting an operating temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design for stable reference performance
• High precision voltage tolerance of +/- 0.05%
• Hermetically sealed glass construction

Applications

• Precision voltage reference circuits
• Temperature compensated regulator designs
• High-stability analog signal conditioning

Procurement Notes

Verify the specific suffix designation against official documentation, as variations may exist within the product line. Confirm RoHS compliance status directly with the manufacturer or authorized distributors prior to procurement, as regulatory certifications can vary by production batch and region.

Selection Notes

Select this component when high accuracy and thermal stability are required in low-current applications. The tight voltage tolerance makes it suitable for precision instrumentation where standard Zener tolerances are insufficient. Ensure the circuit design accommodates the specified test current for optimal regulation.

Part Context

This part belongs to the 1N47xx series of Zener diodes produced by Microchip Technology. The series includes various voltage ratings and tolerance grades, ranging from standard commercial grades to high-precision military specifications. The 1N4779A represents the high-precision variant within this family.

Replacement Considerations

Check datasheets for equivalent parts from other manufacturers offering 8.5 V Zener diodes with similar temperature compensation characteristics and tight tolerance requirements.