1N4744APE3/TR12

Overview

The Microchip Technology 1N4744APE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, providing voltage regulation with a nominal Zener voltage of 15 V and a standard tolerance of ±5%. It operates within a temperature range of -65°C to +150°C and features a plastic DO-41 (DO-204AL) axial-lead package. The device has a maximum power dissipation of 1.0 W at 25°C, a maximum forward voltage of 1.2 V at 200 mA, and a thermal resistance of 45°C/W junction-to-lead. It is supplied in tape and reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Available in RoHS compliant devices with an e3 suffix indicating annealed matte-Tin plating

Applications

• Voltage regulation circuits requiring 15 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 quantity defined by the manufacturer's standard packaging configuration. Confirm the presence of the e3 suffix indicates RoHS compliance and tin-plated terminals rather than lead-based options. Ensure the component matches the JEDEC registered 1N4744A specification for the required 15 V Zener voltage and 5% tolerance. Check for any prefix identifiers if military screening levels are required for the application.

Selection Notes

Select this component when a 15 V Zener voltage with 5% tolerance is required in a 1-watt power rating. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the operating temperature range of -65°C to +150°C for environmental suitability. Verify that the axial lead format fits the PCB layout constraints and that the surge current capabilities meet the circuit protection requirements.

Part Context

This part belongs to the popular 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series provides voltage regulation from 3.3 to 100 volts. The 'P' suffix designates plastic construction, while the 'e3' suffix indicates RoHS compliance. These devices are moisture classified as Level 1 per IPC/JEDEC J-STD-020B.

Replacement Considerations

Surface mount equivalents are available as SMAJ4744A or MLL4744A. Glass-body versions exist with a G suffix instead of P. Military screening options include JAN, JANTX, JANTXV, and JANS prefixes.