1N4773/TR

Overview

The 1N4773/TR is a temperature compensated Zener reference diode manufactured by Microchip Technology. It features a nominal Zener voltage of 9.1 V with a tight tolerance of 5%. The device operates in the DO-204AA-2 axial through-hole package and dissipates up to 500 mW. Key electrical parameters include a maximum reverse leakage current of 10 uA, a Zener impedance of 200 Ohms at a test current of 1 mA, and a voltage temperature coefficient of 0.001 %/C. It supports an operating temperature range from -65 C to +175 C.

Feature Summary

• Provides stable voltage reference performance through temperature compensation technology.
• Utilizes a glass passivated silicon junction for reliable operation across wide thermal ranges.
• Designed for precision applications requiring minimal voltage drift over temperature variations.

Applications

• Precision voltage reference circuits
• Temperature compensated regulation systems
• High-reliability analog signal conditioning

Procurement Notes

Verify the specific suffix configuration against official Microchip documentation to ensure correct screening levels and packaging options. Confirm RoHS compliance status as indicated in the datasheet, noting that standard versions may differ from lead-free variants. Cross-reference the manufacturer part number with distributor listings to validate authenticity and traceability before procurement.

Selection Notes

Select this component when a stable 9.1 V reference with low temperature drift is required in an axial package. Ensure the circuit design accommodates the 500 mW power dissipation limit and the specific test current conditions defined in the specifications. Verify that the operating environment falls within the specified -65 C to +175 C range for optimal performance.

Part Context

This component belongs to the 1N4765 through 1N4774A series of Zero-Temperature Coefficient Reference Diodes. These devices are engineered to provide nominal 9.1 V outputs with exceptionally low temperature coefficients, making them suitable for high-precision applications where voltage stability is critical despite environmental temperature fluctuations.

Replacement Considerations

Equivalent parts within the same series include 1N4772 and 1N4774. Military or high-reliability variants such as MQ1N4773TR offer hermetic sealing and enhanced screening but require verification of pinout and package compatibility.