1N4679UR-1

Overview

The Microchip Technology 1N4679UR-1 is a surface-mount Zener diode with a nominal voltage of 2 V and ±5% tolerance. It features a maximum power dissipation of 500 mW and operates within a temperature range of -65 °C to +175 °C. The device has a maximum reverse leakage current of 5 µA at 1 V and is housed in a DO-213AA package.

Feature Summary

• Hermetically sealed glass construction for environmental stability
• Surface mount DO-213AA (SOD-80) package design
• High thermal stability supporting extended operating temperatures

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage generation

Procurement Notes

Verify the specific suffix UR-1 against official Microchip documentation to confirm the DO-213AA surface mount configuration, as generic 1N4679 identifiers often refer to through-hole variants. Ensure procurement channels provide valid datasheets confirming hermetic sealing and RoHS compliance status for the intended application environment.

Selection Notes

Select this component when a low-voltage 2 V reference is required in a compact surface mount form factor. The high maximum operating temperature of 175 °C makes it suitable for demanding thermal environments where standard silicon devices may fail. Confirm that the 500 mW power rating meets the circuit's peak dissipation requirements.

Part Context

This part belongs to Microchip's discrete semiconductor Zener diode portfolio, specifically designed for precision voltage control applications. The UR-1 designation distinguishes it from axial lead equivalents by utilizing a metal-electrode-lineface (MELF) style SOD-80 package, offering robustness and automated assembly compatibility.

Replacement Considerations

Direct substitutes include other manufacturers' 2 V Zener diodes in DO-213AA packages, such as those from Digitron or Panjit, provided they match the 500 mW rating and hermetic sealing requirements.