1N4731UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4731UR-1/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB package. It provides a nominal Zener voltage of 4.3 V with a standard tolerance of +/- 10%. The device operates within a temperature range of -65°C to +175°C and features a maximum dynamic impedance of 9 Ω at a test current of 58 mA. It includes a hermetically sealed glass MELF case, leadless construction for high-density mounting, and inherent radiation hardness.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF package for high reliability
• Leadless surface mount design suitable for high density applications
• Inherently radiation hard per MicroNote 050
• Electrically equivalent to JEDEC registered 1N4728A thru 1N4764A series

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm tolerance levels and compliance status. Confirm that the TR suffix indicates tape and reel packaging as specified in the mechanical data. Ensure compatibility with the DO-213AB footprint during procurement planning.

Single Zener Diodes Selection Notes

Select this component when a 1.0 W power dissipation rating and a 4.3 V Zener voltage are required in a surface mount form factor. Consider the wide operating temperature range and radiation hardness for demanding environments. Verify that the 10% voltage tolerance meets the circuit requirements compared to tighter tolerance alternatives.

Single Zener Diodes Part Context

This part belongs to the 1N4728UR thru 1N4764AUR series of surface mount 1.0 W glass Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers a broad selection of voltages from 3.3 V to 100 V in the DO-213AB outline, serving as a surface mount alternative to the axial-leaded 1N4728A thru 1N4764A registration.

Single Zener Diodes Replacement Considerations

The MLL4731A is an alternate designation for this device. Surface mount equivalents such as SMAJ4731A are available for different package requirements.