1N4784A

Overview

The Microchip Technology 1N4784A/TR is a temperature-compensated Zener diode designed for precision voltage regulation. It features an 8.5 V nominal Zener voltage with a tight 5% tolerance and operates within a wide thermal range from -65°C to +175°C. The device dissipates up to 500 mW in a DO-204AA-2 axial package, utilizing a 1 mA test current. Key electrical characteristics include a maximum reverse leakage current of 10 µA and a Zener impedance of 100 Ohms. Its low voltage temperature coefficient of 0.0005 %/°C ensures stable performance across varying environmental conditions.

Feature Summary

• Temperature compensated design for enhanced stability
• Wide operating temperature range capability
• Precision voltage regulation with tight tolerance

Applications

• Precision voltage reference circuits
• Temperature-sensitive analog signal conditioning
• High-reliability industrial control systems

Procurement Notes

Verify the specific suffix TR indicates reel packaging when sourcing. Confirm RoHS compliance status as documentation may vary by production batch. Ensure the DO-204AA-2 package dimensions match your PCB layout requirements. Validate that the 500 mW power rating aligns with your thermal management strategy under maximum load conditions.

Selection Notes

Select this component when standard Zener diodes exhibit unacceptable drift due to temperature fluctuations. The 8.5 V breakdown point suits applications requiring mid-range reference voltages without complex divider networks. Consider the 100 Ohm impedance for noise-sensitive designs where lower dynamic resistance is beneficial compared to higher voltage variants.

Part Context

This part belongs to the 1N47xx series of temperature-compensated Zener diodes manufactured by Microchip Technology. These devices are engineered to minimize voltage drift over temperature, distinguishing them from standard Zener diodes. The series covers various voltage levels, with the 1N4784A specifically targeting the 8.5 V segment for high-precision applications.

Replacement Considerations

The 1N4783A shares identical electrical specifications including 8.5 V Zener voltage and 500 mW power dissipation. Verify package compatibility between DO-204AA-2 and DO-35 if substituting. Ensure temperature compensation characteristics remain consistent for critical circuit performance.