1N4744APE3/TR8

Overview

The Microchip Technology 1N4744APE3/TR8 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 with a nominal Zener voltage of 15 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum power dissipation of 1.0 watts at 25°C. Electrical characteristics include a test current of 17 mA, a maximum dynamic impedance of 14 Ohms, and a maximum reverse current of 5 µA.

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
• RoHS compliant devices available 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 matches the required specifications. The 'P' suffix indicates plastic construction, while 'e3' confirms RoHS compliance. The 'TR' suffix designates tape and reel packaging per EIA-296 standards. Confirm the manufacturer source, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure compatibility with the intended thermal and electrical requirements before procurement.

Selection Notes

Select this component when a 15 V Zener voltage with ±5% tolerance is required in a 1-watt plastic axial package. Consider the 14 Ohm dynamic impedance and 5 µA reverse leakage for circuit precision. The plastic body offers lower thermal resistance compared to glass-body options. Verify that the operating environment stays within the specified -65°C to +150°C range and that the power dissipation derating curves are respected for high-temperature applications.

Part Context

This component belongs to the popular 1N4728AP through 1N4764AP series of silicon Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 1N4744A variant specifically targets the 15 V segment of this lineup. These devices are JEDEC registered and offer moisture classification Level 1, eliminating the need for dry pack storage.

Replacement Considerations

Surface mount equivalents such as SMAJ4744A or MLL4744A are available from the same manufacturer family. Other manufacturers producing JEDEC registered 1N4744A parts may serve as functional substitutes if pinout and electrical parameters align.