1N4739AUR

Overview

The 1N4739AUR is a voltage regulator diode manufactured by Microchip Technology. It features a nominal Zener voltage of 9.1 V with a tolerance of 5%. The device has a maximum power dissipation of 1 W and operates in the DO-41-2 through-hole package. Key electrical parameters include a maximum reverse leakage current of 10 uA, a Zener impedance of 5 Ohms, and a test current of 28 mA. The component supports a minimum operating temperature of -65 C and a maximum operating temperature of +175 C.

Feature Summary

• Provides stable voltage regulation at a nominal 9.1 V reference level
• Designed for high stability and reliability in single configuration circuits
• Utilizes low Zener impedance characteristics for effective noise suppression

Applications

• General purpose voltage regulation in electronic circuits
• Reference voltage sources for analog signal processing
• Overvoltage protection stages in power supply designs

Procurement Notes

Verify the specific suffix UR against official Microchip documentation to confirm packaging details and compliance status. Ensure the ordering information matches the required DO-41-2 package type. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before procurement.

Selection Notes

Select this component when a 9.1 V regulated output is required within a 1 W power dissipation limit. The DO-41-2 axial leaded package suits through-hole mounting applications. Verify that the 5% voltage tolerance and 175 C maximum junction temperature meet the specific environmental and precision requirements of the target design.

Part Context

This component belongs to the standard 1N47xx series of Zener diodes, widely used for basic voltage regulation tasks. The 1N4739 variant specifically targets the 9.1 V breakdown region. Microchip Technology produces this device as a reliable discrete semiconductor solution for industrial and commercial electronics requiring robust voltage clamping capabilities.

Replacement Considerations

Compatible substitutes include the 1N4739AG from the same manufacturer family. Other generic equivalents such as 1N4739A from onsemi or Vishay may be considered if pin compatibility and electrical specifications align with the original design constraints.