1N4747E3/TR13

Overview

The Microchip Technology 1N4747E3/TR13 is a silicon 1.0-watt Zener diode in the 1N4728A through 1N4764A series, providing voltage regulation from 3.3 to 100 volts with standard 5% tolerance. It features a plastic DO-41 (DO-204AL) axial-lead package and operates within a temperature range of -65°C to +150°C. The device has a maximum power dissipation of 1.0 watts at 25°C, a forward voltage of 1.2V max at 200mA, and a thermal resistance of 45°C/W junction-to-lead. Electrical characteristics include a nominal Zener voltage of 20V, a test current of 12.5mA, a maximum dynamic impedance of 22 Ohms, and a maximum reverse current of 50µA.

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 1.0 watt power handling
• General purpose electronic equipment protection
• Power supply reference voltage generation

Procurement Notes

Verify that the ordering suffix TR13 corresponds to tape and reel packaging as specified by EIA-296 standards. Confirm RoHS compliance status via the e3 suffix designation. Ensure the component meets moisture classification Level 1 requirements per IPC/JEDEC J-STD-020B, which eliminates the need for dry pack storage prior to use.

Selection Notes

Select this component when a 20V Zener voltage with 5% tolerance is required for axial lead mounting. Consider the 1.0W power dissipation capability and the -65°C to +150°C operating temperature range for environmental suitability. Compare thermal resistance values against PCB copper pad dimensions if surface mounting on FR4 is utilized instead of direct lead mounting.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series of silicon Zener diodes manufactured by Microsemi's Scottsdale Division. The series offers extensive voltage selection from 3.3 to 100 volts. The specific model utilizes a plastic encapsulated body, distinguishing it from glass-body options, and provides lower thermal resistance compared to equivalent glass configurations.

Replacement Considerations

Surface mount equivalents such as SMAJ4747A or MLL4747A are available for space-constrained designs. Military screening levels JAN, JANTX, JANTXV, and JANS can be obtained by adding MQ, MX, MV, or MSP prefixes respectively to the base part number.