1N4921/TR

Overview

The Microchip Technology 1N4921/TR is a temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 18.2 V with a tight tolerance of 5%. The device operates in a surface-mount DO-213AA (SOD-80) package and dissipates up to 500 mW. Key electrical characteristics include a maximum reverse leakage current of 15 uA, a Zener impedance of 150 ohms at a test current of 2 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 reliability construction supports operation in extreme environments up to 175°C
• Surface-mount SOD-80 package facilitates automated assembly and compact circuit layouts

Applications

• Precision voltage reference circuits requiring low temperature drift
• Over-voltage protection stages in sensitive electronic systems
• Benchmark voltage sources for analog-to-digital conversion interfaces

Procurement Notes

Verify the specific suffix configuration against the official Microchip datasheet to confirm package type and tape-and-reel specifications. Ensure the procurement channel provides valid traceability documentation. Confirm that the component meets the required environmental standards for the intended application environment before finalizing orders.

Selection Notes

Select this component when precise voltage stability over temperature is critical. The temperature compensation feature distinguishes it from standard Zener diodes, making it suitable for high-precision analog applications. Evaluate the 500 mW power dissipation limit against the expected load current to ensure safe operating margins within the specified temperature range.

Part Context

This part belongs to Microchip's discrete diode portfolio, specifically within the temperature-compensated Zener series. These components are engineered for applications demanding superior voltage stability compared to conventional Zener devices. The product line supports various industrial and commercial sectors requiring reliable passive semiconductor solutions.

Replacement Considerations

Consult official Microchip documentation for verified cross-reference part numbers. Do not substitute with generic Zener diodes lacking temperature compensation unless thermal stability requirements are relaxed. Verify pinout compatibility and package dimensions before integrating alternative components.