1N4775

Overview

The Microchip Technology 1N4775 is a temperature-compensated Zener reference diode housed in the DO-204AH (DO-35) axial leaded package. It provides an 8.5 V nominal Zener voltage with a ±5% tolerance and a power dissipation rating of 500 mW. Designed for precision applications, this component utilizes a specific construction to achieve low-level temperature compensation, ensuring stable voltage regulation across varying thermal conditions.

Feature Summary

• Temperature compensated design for stable voltage reference
• Low-level Zener reference characteristics
• Through-hole axial leaded construction

Applications

• Precision voltage reference circuits
• Temperature compensated regulator designs
• Calibration equipment references

Procurement Notes

Verify the manufacturer origin, as historical data indicates production by multiple entities including Microsemi and Motorola. Confirm the specific datasheet version matches the required tolerance and package specifications. Ensure the component meets the intended temperature range requirements for the application environment.

Selection Notes

Select this component when a stable 8.5 V reference is required with minimal drift over temperature variations. The DO-35 package suits through-hole PCB layouts. Consider the ±5% tolerance for budgeting circuit accuracy. Verify compatibility with existing thermal management strategies due to the 500 mW power rating.

Part Context

This part belongs to the series of Zero-TC Reference Diodes, which includes variants from 1N4775 to 1N4784A. These diodes are engineered to provide a near-zero temperature coefficient at their specific nominal voltage points, making them distinct from standard Zener diodes used for general regulation or protection.

Replacement Considerations

Cross-reference with other manufacturers' 1N4775 equivalents such as those from Motorola or Compensated Devices Inc. Ensure the substitute maintains the 8.5 V nominal voltage and DO-35 package form factor. Verify that the replacement's temperature coefficient characteristics match the original design requirements.