1N4747PE3/TR12

Overview

The Microchip Technology 1N4747PE3/TR12 is a silicon 1-watt Zener diode with a nominal voltage of 20V and a 5% tolerance. It operates within a temperature range of -65°C to +150°C, featuring a maximum dynamic impedance of 22 ohms at a test current of 12.5 mA. The device utilizes a DO-41 axial lead package with void-free transfer molded epoxy body. RoHS compliance is indicated by the e3 suffix, while TR12 denotes tape and reel packaging.

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

Applications

• Voltage regulation in power supply circuits
• Reference voltage generation in electronic systems
• Overvoltage protection components

Procurement Notes

Verify that the specific part number matches the required electrical characteristics and packaging format. Confirm RoHS compliance status and ensure the supplier provides valid traceability documentation. Check for any specific handling requirements despite Level 1 moisture classification.

Selection Notes

Select this component when a 20V regulation point is required with 5% tolerance. Ensure the application supports the 1W power dissipation limit and consider thermal derating if ambient temperatures exceed standard limits. Verify compatibility with existing PCB footprint dimensions for the DO-41 package.

Part Context

This component belongs to the 1N47xx series of 1-watt Zener diodes manufactured by Microchip Technology (formerly Microsemi). The series offers a wide selection of voltages from 3.3V to 100V. The 'P' suffix indicates plastic encapsulation, distinguishing it from glass-body options.

Replacement Considerations

Compatible replacements include other 1N4747 variants with matching voltage and power ratings. Ensure substitute parts maintain the same package type and tolerance specifications.