1N4749CE3/TR13

Overview

The Microchip Technology 1N4749CE3/TR13 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 24 volts with a tight tolerance of plus or minus 2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and features RoHS compliance via the 'e3' suffix. Packaged in tape and reel format per EIA-296 standards as denoted by the 'TR13' suffix, it offers flexible mounting terminals and void-free transfer molded epoxy construction.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard circuit integration
• 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 in power supply circuits
• Reference voltage generation in electronic systems
• Overvoltage protection applications

Procurement Notes

Verify that the ordering suffixes align with specific requirements: 'C' confirms the 2% voltage tolerance, 'e3' ensures RoHS compliance, and 'TR13' indicates tape and reel packaging. Confirm the manufacturer designation, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the procurement matches the exact JEDEC registered type number for compatibility.

Selection Notes

Select this component when a precise 24-volt reference with high accuracy is required. The 2% tolerance distinguishes it from standard 5% or 10% variants. Consider the plastic DO-41 package for its lower thermal resistance compared to glass-body options. Verify that the 1.0-watt power dissipation rating meets the thermal management needs of the target application environment.

Part Context

This device belongs to the widely used 1N47xxA series of silicon Zener diodes. The 'P' suffix denotes the plastic encapsulated version, which offers improved thermal characteristics over older glass-body designs. The 'e3' suffix signifies lead finish and material compliance with environmental directives. This specific variant combines the robust mechanical properties of the plastic package with tight electrical tolerances for precision applications.

Replacement Considerations

Direct replacements include other manufacturers' 1N4749A equivalents. For tighter tolerance requirements, consider 1N4749D. For looser tolerances, 1N4749AG or 1N4749A are suitable. Surface mount alternatives in the SMAJ or MLL families may be considered if board space constraints exist.