1N4749APE3/TR8

Overview

The Microchip Technology 1N4749APE3/TR8 is a silicon voltage regulator diode housed in a plastic DO-41 (DO-204AL) axial lead package. It provides a nominal Zener voltage of 24 V with a standard tolerance of ±5%. The device dissipates up to 1.0 W at 25°C and operates within a temperature range of -65°C to +150°C. Electrical characteristics include a maximum dynamic impedance of 25 Ohms at a test current of 10.5 mA, a maximum reverse leakage current of 5 µA at the test voltage, and a maximum forward voltage of 1.2 V at 200 mA.

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
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Low voltage stabilizers
• Voltage reference circuits
• General purpose voltage regulation

Procurement Notes

Verify that the ordering suffix 'TR8' corresponds to the tape and reel packaging option as specified in the datasheet. Confirm RoHS compliance status associated with the 'e3' suffix. Ensure the component matches the specific JEDEC registered type number requirements for your design specifications before finalizing procurement.

Selection Notes

Select this component when a 24 V regulation point with 5% tolerance is required in an axial package. Consider the 1.0 W power dissipation limit and thermal resistance values for heat management. Verify that the plastic construction meets environmental requirements compared to glass-body options if hermetic sealing is necessary.

Part Context

This part belongs to the 1N4728AP thru 1N4764AP series of 1.0 watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. The series offers extensive voltage selection from 3.3 to 100 volts. The 'P' suffix indicates plastic encapsulation, while 'e3' denotes RoHS compliant annealed matte-Tin plating on the terminals.

Replacement Considerations

Consult the manufacturer's documentation for surface mount equivalents such as SMAJ4749A or MLL4749A. Other manufacturers producing JEDEC registered 1N4749A types may offer compatible replacements, but verify electrical parameters and package dimensions match.