1N4743PE3/TR12

Overview

The Microchip Technology 1N4743PE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation at a nominal Zener voltage of 13 V with a standard tolerance of ±10%. 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, it offers flexible mounting terminals and void-free epoxy encapsulation.

Feature Summary

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

Applications

• Voltage regulation circuits requiring 13 V reference
• Power supply protection and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix TR12 corresponds to the specific tape and reel packaging configuration required for automated assembly processes. Confirm that the e3 suffix indicates RoHS compliant annealed matte-Tin plating solderable per MIL-STD-750 method 2026. Ensure compatibility with existing moisture classification Level 1 requirements, which do not necessitate dry pack storage.

Selection Notes

Select this component when a 13 V Zener voltage with ±10% tolerance is required in a plastic DO-41 package. Consider the 1.0 W power dissipation capability at 25°C and the thermal resistance characteristics for heat management. Verify that the axial lead form factor fits the board layout constraints compared to surface mount equivalents like SMAJ4743A.

Part Context

This part belongs to the JEDEC registered 1N4728A through 1N4764A series of 1.0 watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a voltage selection from 3.3 to 100 volts. The P suffix designates plastic construction, offering lower thermal resistance compared to glass-body options, while the e3 suffix denotes RoHS compliance.

Replacement Considerations

Surface mount equivalents are available as SMAJ4743A or MLL4743A. Glass-body versions exist under the G suffix designation for the same JEDEC part numbers. Military screening levels can be obtained by adding MQ, MX, MV, or MSP prefixes respectively.