1N4733AURE3/TR

Overview

The Microchip Technology 1N4733AURE3/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB MELF package. It provides a nominal Zener voltage of 5.1 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 49 mA, a maximum dynamic impedance of 7 Ohms, and a maximum forward voltage of 1.2 V at 200 mA.

Feature Summary

• Hermetically sealed glass MELF package suitable for high reliability applications
• Surface mount design ideal for high density mounting with low parasitic requirements
• Inherently radiation hard per MicroNote 050
• Compatible with source control drawings (SCD) for specialized screening

Applications

• Voltage regulation in high density electronic circuits
• High reliability systems requiring hermetic sealing
• Applications necessitating radiation hardness

Procurement Notes

Verify that the ordering suffix 'e3' confirms RoHS compliance and specifies annealed matte-Tin plating solderable per MIL-STD-750 method 2026. Confirm the 'TR' suffix indicates tape and reel packaging per EIA-481-B standards. Ensure the part number matches the specific manufacturer's documentation for the 1N4728AUR through 1N4764AUR series to validate electrical parameters and mechanical dimensions.

Selection Notes

Select this component when a surface mount equivalent to the axial-leaded 1N4733A is required. The DO-213AB package offers lower inductance compared to traditional axial packages. Consider the wide operating temperature range and radiation hardness if the application environment demands these specific robustness criteria over standard commercial grade alternatives.

Part Context

This component belongs to the 1N4728AUR through 1N4764AUR series of surface mount 1.0 W glass Zener diodes manufactured by Microsemi (now Microchip Technology). The series is electrically equivalent to the JEDEC registered 1N4728A through 1N4764A registration but utilizes the DO-213AB outline. It serves as a direct surface mount replacement for legacy axial components while maintaining similar electrical performance profiles.

Replacement Considerations

The datasheet identifies plastic body axial-leaded equivalents as 1N4728A to 1N4764A. Surface mount equivalents are also available as SMAJ4728A to SMAJ4764A. Verify pinout polarity and thermal dissipation requirements when substituting.