1N4776A

Overview

The Microchip Technology 1N4776A is a temperature-compensated Zener diode designed for precision voltage reference applications. It features an 8.5 V nominal Zener voltage with a ±5% tolerance and a maximum power dissipation of 500 mW. The device utilizes a DO-35 (DO-204AH) glass axial leaded package, ensuring reliable performance in low-level circuit environments.

Feature Summary

• Temperature compensated design for stable voltage reference
• Glass passivated junction for environmental protection
• Low impedance characteristics for noise-sensitive applications

Applications

• Precision voltage references
• Temperature compensated circuits
• Low-level signal conditioning

Procurement Notes

Verify the manufacturer part number against official Microchip Technology documentation to ensure authenticity. Confirm that the component matches the specified DO-35 package and 8.5V rating. Check for any specific ordering suffixes that may indicate tape-and-reel packaging versus bulk quantities, as these affect handling but not electrical function.

Selection Notes

Select this component when a stable, temperature-compensated voltage reference is required in a small axial package. Ensure the application current does not exceed limits derived from the 500 mW power dissipation rating at the operating ambient temperature. Verify compatibility with the target PCB footprint for the DO-35 lead configuration.

Part Context

This component belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. The 'A' suffix typically denotes a tighter tolerance or specific temperature compensation characteristic compared to standard variants. It is part of a long-standing family of glass-passivated silicon Zener diodes used in industrial and commercial electronics.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4776A equivalents, such as Vishay or Central Semiconductor. Ensure substitute parts meet the same 8.5V nominal voltage, ±5% tolerance, and 500 mW power rating. Verify that replacement components also offer temperature compensation if stability is critical.