1N4732UR-1/TR

Overview

The Microchip Technology 1N4732UR-1/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB MELF package. It provides a nominal Zener voltage of 4.7 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum dynamic impedance of 8 Ohms at a test current of 53 mA. It includes a maximum reverse current of 10 µA and supports steady-state power dissipation up to 1.00 watts.

Feature Summary

• Hermetically sealed glass MELF package for high reliability applications
• Surface mount design suitable for high density mounting
• Inherently radiation hard per MicroNote 050
• ESD nonsensitive construction

Applications

• Voltage regulation circuits
• High density electronic assemblies
• Low parasitic requirement designs
• Harsh environment applications requiring radiation hardness

Procurement Notes

Verify the specific suffix requirements against the official datasheet before ordering, as suffixes determine tolerance levels and compliance status. Confirm that the TR suffix indicates tape and reel packaging. Ensure the selected variant meets the necessary screening standards if source control drawings are required for the application.

Selection Notes

Select this component when a surface mount solution is needed for 4.7 V regulation with 1 W power handling. The DO-213AB package offers an alternative to axial leads while maintaining electrical equivalence to the 1N4732A series. Consider the hermetic seal and radiation hardness for specialized industrial or aerospace environments where standard plastic packages may be insufficient.

Part Context

This part belongs to the 1N4728AUR through 1N4764AUR series of surface mount Zener diodes manufactured by Microchip Technology (formerly Microsemi). The series covers a wide voltage range from 3.3 V to 100 V. These devices are designed to replace traditional axial-leaded equivalents in modern PCB layouts, offering similar electrical performance in a compact, leadless form factor.

Replacement Considerations

The 1N4732UR-1/TR is electrically equivalent to the 1N4732A series in terms of function but differs in package style. Surface mount equivalents include MLL4732A. For axial lead replacements, the 1N4732A or 1N4732P can be used if board space allows.