1N4780A/TR

Overview

The Microchip Technology 1N4780A/TR is a temperature-compensated Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 8.5 V with a tolerance of ±5%. The device has a maximum power dissipation rating of 500 mW and operates within a reverse current range up to 10 µA. It utilizes the DO-204AH (DO-35) axial through-hole package, measuring 7.62 mm in length. The component supports an operating temperature range from -65 °C to 175 °C, ensuring stability in demanding environments.

Feature Summary

• Temperature compensated design for stable voltage reference performance across varying thermal conditions
• Axial leaded construction suitable for through-hole mounting on printed circuit boards
• Silicon-based Zener junction providing reliable voltage regulation capabilities

Applications

• Automotive power systems requiring stable voltage references
• Networking equipment utilizing low power signal processing
• General purpose voltage regulation circuits

Procurement Notes

Verify the specific suffix /TR indicates tape and reel packaging configuration when sourcing. Confirm RoHS compliance status directly with the manufacturer or authorized distributor documentation prior to integration. Ensure the DO-35 package dimensions align with the target PCB footprint requirements. Cross-reference the 8.5 V nominal voltage specification against circuit design constraints to prevent overvoltage issues.

Selection Notes

Select this component when a precise 8.5 V reference is required with tight temperature compensation characteristics. The 500 mW power rating suits low-current regulation tasks where higher dissipation is unnecessary. The axial package facilitates easy manual assembly or standard automated placement processes. Consider the wide operating temperature range for industrial or automotive deployments where thermal stability is critical for long-term reliability.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. The series offers various voltage options within the DO-35 package form factor. The 1N4780A variant specifically targets applications needing an 8.5 V breakdown voltage. The /TR suffix denotes bulk reel packaging for high-volume manufacturing efficiency.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4780A parts meeting identical 8.5 V, 500 mW, and DO-35 specifications. Verify temperature coefficient compatibility if thermal stability is a primary design constraint. Ensure equivalent reverse leakage current ratings are maintained for sensitive circuit applications.