1N4738AURE3

Overview

The Microchip Technology 1N4738AURE3 is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 8.2 V with a tolerance of 5%. The device is rated for a power dissipation of 1 W and operates within a temperature range from -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 10 uA, a Zener impedance of 4.5 Ohms, and a test current of 31 mA. The component utilizes a DO-213AB (SMA) surface-mount package.

Feature Summary

• Provides stable voltage regulation using a single Zener junction structure.
• Engineered for high-temperature operation up to 175°C.
• Utilizes hermetic glass encapsulation for environmental protection.

Applications

• Voltage reference circuits requiring stable DC levels.
• Overvoltage protection in electronic systems.
• Clamping applications in signal processing paths.

Procurement Notes

Verify the specific suffix 'AURE3' against official Microchip documentation to confirm compliance with RoHS directives and REACH standards. Ensure the ordering part number matches the required package style and testing specifications. Cross-reference datasheet revisions to validate electrical parameters before integration into designs.

Selection Notes

Select this component when a surface-mount Zener diode with high thermal stability is required. The DO-213AB package offers compact footprint advantages over through-hole alternatives. Consider the 1 W power rating and 175°C operating limit for demanding environments where standard commercial grade devices may fail.

Part Context

This part belongs to the 1N47xx series of 1 Watt Zener diodes manufactured by Microchip Technology. The series provides a wide range of voltage options for general-purpose regulation. The 'AURe3' designation indicates a specific surface-mount variant compliant with environmental standards, distinct from older or military-grade versions.

Replacement Considerations

Compatible substitutes include the Nexperia 1N4738A and onsemi 1N4738ATR. Verify that replacement parts maintain the same DO-213AB footprint and 8.2 V Zener voltage specification. Confirm that thermal resistance and leakage current limits meet original design requirements.