1N4689/TR

Overview

The Microchip Technology 1N4689/TR is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.1 V with a tolerance of 2%. The device operates in the Through-Hole DO-213AA (MELF) package and supports a maximum power dissipation of 0.5 W. It functions within an operating temperature range from -65°C to +175°C. Key electrical parameters include a maximum reverse leakage current of 1 µA at 4 V and a forward voltage of 1.1 V at 200 mA. The component is supplied in Reel packaging.

Feature Summary

• Provides precise voltage regulation with a tight 2% tolerance on the 5.1 V Zener voltage.
• Engineered for high-reliability environments with an extended operating temperature range up to 175°C.
• Utilizes a hermetically sealed glass MELF package suitable for surface mount integration.

Applications

• Precision voltage reference circuits requiring low drift
• Over-voltage protection stages in sensitive electronics
• Temperature-compensated regulator designs

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm the exact tolerance grade and testing specifications. Ensure that the procurement channel provides valid traceability records, as this component is often designated for high-reliability or aerospace applications. Confirm the reel quantity matches the production requirements before finalizing orders.

Selection Notes

Select this component when a stable 5.1 V reference is required with tighter accuracy than standard 5% variants. The MELF package offers a compact footprint compared to axial leads while maintaining robust thermal performance. Consider the low leakage current characteristics for high-impedance circuit designs where minimal current draw is critical.

Part Context

This part belongs to the 1N46xx series of Zener diodes manufactured by Microchip Technology. The series includes various voltage options packaged in both axial leaded and surface mount configurations. The 1N4689 variant specifically targets applications needing higher precision than the standard commercial grade devices found in the same family.

Replacement Considerations

Direct substitutes include other manufacturers' 5.1 V Zener diodes in the DO-213AA package with 2% tolerance. Verify pinout compatibility and thermal resistance ratings before substitution. Cross-reference with Microchip's official replacement guide for qualified equivalents.