1N4771A/TR

Overview

The Microchip Technology 1N4771A/TR is a single silicon Zener diode housed in the DO-204AA (DO-7) through-hole package. It features a nominal Zener voltage of 9.1 V with a tolerance of ±5%. The device has a maximum power dissipation of 0.25 W and operates within a temperature range of -65°C to +175°C. Key electrical parameters include a maximum reverse leakage current of 10 nA, a Zener impedance of 175 ohms at a test current of 3.3 mA, and a forward current rating of 200 mA.

Feature Summary

• Provides stable voltage regulation via Zener breakdown characteristics
• Features low reverse leakage current for precision applications
• Constructed with hermetically sealed glass encapsulation

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in sensitive electronics
• Temperature compensated biasing networks

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as regulatory markings may vary by production batch. Ensure the required operating temperature range aligns with the component's specified limits before finalizing procurement specifications.

Selection Notes

Select this component when a 9.1 V reference is needed in a standard axial leaded package. Consider the 0.25 W power rating for thermal management requirements. Verify that the 175 ohm Zener impedance meets the noise and stability requirements of the target circuit design compared to lower impedance alternatives.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. These components are widely used in general-purpose electronic designs where reliable voltage regulation is required. The DO-204AA package offers a balance of performance and ease of manual or automated assembly.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4771A equivalents. Verify pinout compatibility and ensure the replacement part meets the same 9.1 V Zener voltage and 0.25 W power dissipation ratings. Check for identical package dimensions to fit existing footprints.