1N4733APE3/TR8

Overview

The Microchip Technology 1N4733APE3/TR8 is a silicon planar Zener diode in the 1N4728AP through 1N4764AP series. It provides voltage regulation with a nominal Zener voltage of 5.1 V and a standard tolerance of ±5%. The device operates at a test current of 49 mA and features a maximum dynamic impedance of 7 Ohms. It dissipates up to 1.0 W of power, has a maximum reverse current of 10 µA, and withstands a surge current of 550 mA. The component utilizes a DO-41 axial lead plastic package and is supplied in tape and reel format.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for easy integration
• Constructed with a void-free transfer molded thermosetting epoxy body
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 5.1 V reference
• Power supply protection and clamping applications
• General purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix matches the required specifications. The 'P' suffix indicates plastic construction, while 'e3' confirms RoHS compliance. The 'TR' suffix designates the tape and reel packaging option. Confirm the manufacturer origin, as this part originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the specific variant aligns with your circuit's thermal and electrical requirements.

Selection Notes

Select this component when a 5.1 V Zener voltage with ±5% tolerance is required in an axial-lead package. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the 1.0 W power dissipation capability and the specific test current of 49 mA for accurate regulation. This part is suitable for applications needing robust ESD immunity and moisture classification Level 1 without dry pack requirements.

Part Context

This device belongs to the popular 1N4728AP through 1N4764AP series of 1.0 watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. These plastic encapsulated Zeners are JEDEC registered and offer standard voltage tolerances of plus/minus 5% for the 'A' suffix designation. The series is designed for general-purpose voltage regulation tasks.

Replacement Considerations

Surface mount equivalents such as SMAJ4733A or MLL4733A are available. For higher reliability needs, military screening levels can be obtained by adding prefixes like MQ, MX, MV, or MSP to the part number.