1N4749APE3/TR12

Overview

The Microchip Technology 1N4749APE3/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 with a nominal Zener voltage of 24 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features RoHS-compliant annealed matte-tin plating on its terminals.

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
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 24 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 tape-and-reel packaging as specified by EIA-296 standards. Confirm the presence of the e3 suffix indicates RoHS compliance with annealed matte-tin plating. Ensure the A suffix confirms the required 5% voltage tolerance for your specific design requirements before procurement.

Selection Notes

Select this component when a 24 V Zener voltage with tight 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 -65°C to +150°C operating range for environments with significant thermal variations or extreme cold conditions.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series manufactured by Microsemi Scottsdale Division. The series covers a wide voltage selection from 3.3 to 100 volts. The 'P' suffix denotes plastic construction, while the 'e3' suffix identifies RoHS-compliant devices available from the manufacturer.

Replacement Considerations

Surface mount equivalents such as SMAJ4749A or MLL4749A are available from the same manufacturer family. Verify compatibility regarding power dissipation and physical footprint when transitioning from axial-lead to surface-mount packages.