1N4738APE3/TR12

Overview

The Microchip Technology 1N4738APE3/TR12 is a silicon Zener diode with an 8.2V nominal voltage and 5% tolerance, housed in a plastic DO-41 (DO-204AL) package. It provides 1.0W power dissipation at 25°C, operates from -65°C to +150°C, and features RoHS-compliant tin-plated terminals.

Feature Summary

• Plastic encapsulation offering lower thermal resistance compared to glass-body options
• Moisture classification Level 1 requiring no dry pack storage
• ESD nonsensitive per MIL-STD-750 Method 1020

Applications

• Voltage regulation across broad operating current and temperature ranges
• Military screening applications via prefix identifiers
• Surface mount equivalents available for automated placement

Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm RoHS compliance and tape-and-reel packaging details. Ensure the ordering part number matches the required military screening level if applicable, as prefixes modify the base JEDEC designation.

Selection Notes

Select this component for applications requiring 1.0W power handling in a plastic axial-lead package. The 'e3' suffix indicates RoHS compliance, while the 'TR' suffix confirms tape-and-reel delivery. Verify thermal derating requirements based on ambient or lead temperature conditions.

Part Context

This device belongs to the 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers voltages from 3.3V to 100V with standard 5% tolerances for the 'A' suffix.

Replacement Considerations

Glass-body equivalents exist under the same JEDEC numbers with a 'G' suffix. Surface mount replacements include SMAJ4738A and MLL4738A variants.