1N4738UR/TR

Overview

The Microchip Technology 1N4738UR/TR is a surface mountable 1.0-watt glass Zener diode in the DO-213AB MELF package. It provides an 8.2V nominal Zener voltage with a standard ±5% tolerance. The device operates within a temperature range of -65°C to +175°C and features hermetically sealed construction for high reliability applications.

Feature Summary

• Hermetically sealed glass MELF package suitable for high-reliability environments
• Surface mount design ideal for high-density mounting with low parasitic requirements
• Electrically equivalent to JEDEC registered 1N4738A axial-leaded series

Applications

• Voltage regulation in high-density electronic circuits
• High reliability applications requiring source control drawings
• Low parasitic requirement circuit designs

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm exact electrical tolerances and screening levels. Confirm RoHS compliance status if required by project specifications, as non-compliant variants exist within the series. Ensure compatibility with the specified DO-213AB footprint during procurement planning.

Selection Notes

Select this component when a surface mount solution is required that matches the electrical characteristics of the traditional 1N4738A axial diode. Consider the hermetic seal for harsh environments and the 1W power dissipation capability for robust voltage regulation needs.

Part Context

This part belongs to the 1N4728AUR through 1N4764AUR series of surface mount Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers a wide selection of voltages from 3.3V to 100V in a leadless DO-213AB package, providing a direct surface mount alternative to the popular DO-41 axial series.

Replacement Considerations

The 1N4738A in a DO-41 package is the electrically equivalent axial-leaded counterpart. Surface mount equivalents such as SMAJ4738A are also available within the manufacturer's portfolio.