1N4734UR/TR

Overview

The Microchip Technology 1N4734UR/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB MELF package. It provides a nominal Zener voltage of 5.6 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 10 µA at 1 V. Electrical characteristics include a test current of 45 mA, dynamic impedance of 5 Ohms at IZT, and a maximum regulator current of 1.0 A.

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
• Leadless package nonsensitive to ESD

Applications

• Voltage regulation in high density circuits
• Applications requiring low parasitic requirements
• High reliability systems specified by source control drawings

Procurement Notes

Verify the specific suffix configuration against the manufacturer's datasheet to confirm electrical tolerances and compliance status. Ensure the ordering part number matches the required voltage tolerance and packaging format. Confirm that the component meets all necessary environmental and screening standards for the intended application before procurement.

Selection Notes

Select this component for designs requiring a 1.0 W surface mount Zener diode with hermetic sealing. The DO-213AB package offers an alternative to axial leads while maintaining equivalent electrical performance to the JEDEC registered 1N4734 series. Consider the thermal resistance and derating curves when designing the PCB footprint for optimal heat dissipation.

Part Context

This component belongs to the 1N4728AUR through 1N4764AUR series of surface mount Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers Zener voltages from 3.3 V to 100 V. The 1N4734AUR variant specifically addresses the 5.6 V segment of this lineup, offering a robust solution for power regulation in compact electronic assemblies.

Replacement Considerations

Equivalent parts include the MLL4734A series. Surface mount equivalents such as SMAJ4734A are available for different form factor requirements. Axial leaded versions like the 1N4734A provide mechanical alternatives.