1N4733PE3/TR12

Overview

The Microchip Technology 1N4733PE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 axial lead package. It provides voltage regulation with a nominal Zener voltage of 5.1 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features RoHS compliance indicated by the e3 suffix. Packaged in tape and reel format per EIA-296 standards as denoted by the TR suffix, it offers flexible mounting terminals and void-free transfer molded epoxy construction.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard circuit integration
• Constructed with void-free transfer molded thermosetting epoxy meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage reference circuits requiring stable DC levels
• Power supply output regulation and protection
• Overvoltage clamping in electronic systems

Procurement Notes

Verify that the ordering suffixes align with specific requirements: 'P' indicates plastic construction, 'e3' confirms RoHS compliance, and 'TR' specifies tape and reel packaging. Confirm the manufacturer designation, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the requested quantity matches the manufacturing multiples associated with the reel packaging option.

Selection Notes

Select this component when a 5.1 V regulation point is required with a 1.0 W power dissipation capacity at 25°C. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the extended operating temperature range up to +150°C for demanding environments. Verify that the ±5% voltage tolerance meets the design specifications before finalizing the selection.

Part Context

This device belongs to the JEDEC registered 1N4728A through 1N4764A series of 1.0 watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix distinguishes the plastic encapsulated version from glass-body alternatives, while the 'e3' suffix denotes environmental compliance. These components are widely used for general-purpose voltage regulation tasks in industrial and commercial electronics.

Replacement Considerations

Compatible replacements include other 1N4733A variants from different manufacturers offering identical electrical characteristics and DO-41 packaging. Surface mount equivalents such as SMAJ4733A or MLL4733A may be considered if board space constraints require SMT solutions, though mechanical mounting differences must be addressed.