1N4688UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4688UR-1/TR is a surface mount Zener voltage regulator in the 1N4678UR-1 through 1N4717UR-1 series. It features a hermetically sealed glass DO-213AA (MELF) package with internal metallurgical bonding for high reliability. The device provides a nominal Zener voltage of 4.7 V at a test current of 50 µA, with a maximum voltage regulation of 0.99 V and a maximum reverse leakage current of 10.0 µA. It supports a steady-state power dissipation of 0.5 W and operates within a junction temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA MELF package with internal metallurgical bond
• Voltage selection from 1.8 to 43 V with standard +/-5% tolerance
• Non-sensitive to ESD per MIL-STD-750 method 1020
• Inherently radiation hard

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic circuits requiring radiation hardness
• Surface mount designs needing minimal capacitance

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix to confirm RoHS compliance status and tape-and-reel packaging configuration. Ensure the selected variant matches the required voltage tolerance and reliability screening level. Confirm that the component meets the necessary environmental and electrical specifications for the intended application before procurement.

Single Zener Diodes Selection Notes

Select this component for applications requiring a 4.7 V reference in a compact surface mount form factor. Consider the 500 mW power dissipation limit and the -65°C to +175°C operating temperature range. Evaluate the need for hermetic sealing and radiation hardness against alternative commercial-grade options.

Single Zener Diodes Part Context

This part belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5 W glass surface mount Zener diodes. These devices serve as surface mount equivalents to the JEDEC registered 1N4678 through 1N4717 axial leaded series. The series offers various voltage options and tolerance levels, including tighter 1% and 2% variants.

Single Zener Diodes Replacement Considerations

Direct replacements include other 1N4688 series variants with different tolerances or packaging suffixes. Verify compatibility with existing footprints and thermal requirements when substituting.