1N4780C/TR

Overview

The Microchip Technology 1N4780C/TR is a temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 8.5 V with a tight tolerance of ±2%. The device operates in the DO-7 (DO-204AA) axial through-hole package and dissipates up to 500 mW of power. Key electrical characteristics include a maximum reverse leakage current of 10 µA, a Zener impedance of 100 Ω at a test current of 1 mA, and an operating temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High precision voltage tolerance of ±2% for critical reference applications
• Extended high-temperature operation capability up to +175°C junction temperature

Applications

• Precision voltage reference circuits requiring low temperature drift
• Overvoltage protection in sensitive electronic systems
• Voltage regulator designs utilizing temperature-compensated references

Procurement Notes

Verify the specific suffix 'C' indicates the ±2% tolerance variant distinct from standard 5% parts. Confirm the DO-7 axial package matches your PCB footprint requirements. Ensure the 500 mW power rating aligns with your circuit's thermal dissipation needs. Check for RoHS compliance status as indicated by manufacturer documentation.

Selection Notes

Select this component when precise voltage stability over temperature is required, unlike standard Zener diodes. The 8.5 V output suits mid-range reference needs. Consider the axial leaded package for through-hole assembly processes. Evaluate the 100 Ω impedance against source impedance limitations in your application design.

Part Context

This part belongs to Microchip's legacy 1N47xx series of Zener diodes, adapted for modern manufacturing. The 'TR' suffix denotes tape and reel packaging for automated assembly. The 'C' designation typically signifies tighter tolerance grades within the product family, distinguishing it from general-purpose variants.

Replacement Considerations

Cross-reference with other manufacturers' temperature-compensated Zener diodes offering 8.5 V ±2% tolerance in DO-7 packages. Verify pinout compatibility and thermal characteristics before substitution.