1N4739A_S00Z

Overview

The onsemi 1N4739A is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 9.1 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within an ambient temperature range of -65 °C to +200 °C. It utilizes the DO-41 axial through-hole package, measuring approximately 5.2 mm in length and 2.72 mm in diameter. Key electrical characteristics include a maximum dynamic impedance of 5 Ohms at a test current of 28 mA and a maximum reverse leakage current of 10 µA at 7 V.

Feature Summary

• Provides stable voltage regulation using a single silicon junction structure.
• Capable of handling high thermal loads with a maximum power dissipation rating of 1 W.
• Offers low dynamic impedance to maintain consistent voltage under varying current conditions.
• Features a robust glass passivated junction housed in a standard axial leaded package.

Applications

• General-purpose voltage reference circuits
• Overvoltage protection stages
• Power supply output regulation

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact testing parameters and compliance status. Ensure that the procurement channel provides valid traceability for the component lot. Confirm that the received parts match the specified DO-41 package dimensions and marking codes. Cross-reference the datasheet revision date to ensure alignment with current manufacturing standards.

Selection Notes

Select this component when a precise 9.1 V reference point is required in through-hole designs. Consider the 1 W power rating for thermal management requirements in the target application environment. Evaluate the ±5% voltage tolerance against circuit sensitivity needs. Verify that the operating temperature range meets the environmental constraints of the final assembly.

Part Context

This part belongs to the widely recognized 1N47 series of Zener diodes, which are industry-standard components for basic voltage regulation tasks. The 1N4739A specifically targets the 9.1 V segment of this family. Manufactured by onsemi, it adheres to traditional JEDEC-style numbering conventions while incorporating modern manufacturing processes for reliability.

Replacement Considerations

Compatible substitutes include the Microchip Technology 1N4739A and the Rectron 1N4739A. These alternatives share identical electrical specifications and the DO-41 package form factor. Verify pinout orientation and physical dimensions before integrating any cross-manufacturer replacement into existing PCB layouts.