1N4897/TR

Overview

The Microchip Technology 1N4897/TR is a temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 12.8 V with a tight tolerance of ±5%. The device is rated for a power dissipation of 400 mW and operates within an extended temperature range from -65°C to +175°C. Packaged in the DO-7 axial leaded format, it utilizes a reel packaging configuration suitable for automated assembly processes.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High reliability construction supports operation in extreme environmental conditions up to 175°C
• Precision voltage tolerance maintains accuracy in sensitive reference circuits

Applications

• Precision voltage reference sources requiring thermal stability
• Overvoltage protection circuits in harsh environments
• Temperature compensation networks in analog signal conditioning

Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified suppliers. Confirm RoHS status as non-compliant per official documentation. Ensure ordering quantities align with manufacturer minimum order requirements and reel specifications. Validate datasheet revisions match production batch dates to guarantee parameter consistency.

Selection Notes

Select this component when precise voltage referencing under varying thermal loads is critical. The DO-7 package suits through-hole mounting constraints. Consider the 400 mW power rating against expected circuit dissipation. Verify that the 12.8 V nominal value aligns with system voltage requirements before integration into final designs.

Part Context

This part belongs to Microchip's legacy 1N series of Zener diodes, specifically the temperature-compensated variants. These components are engineered for high-reliability industrial and aerospace applications where standard Zener drift is unacceptable. The /TR suffix indicates tape-and-reel packaging for high-volume manufacturing efficiency.

Replacement Considerations

Direct substitutes include other 12.8 V temperature-compensated Zener diodes from qualified manufacturers. Verify pinout compatibility with DO-7 packages. Ensure equivalent power ratings and temperature coefficients match original design specifications before substitution.