1N4747CP/TR12

Overview

The Microchip Technology 1N4747CP/TR12 is a silicon 1-watt Zener diode with a nominal voltage of 20V and a tight tolerance of ±2%. It operates within a temperature range of -65°C to +150°C. The device features a plastic DO-41 axial lead package, providing flexible mounting terminals. Electrical characteristics include a maximum dynamic impedance of 22 ohms at a test current of 12.5 mA and a maximum reverse current of 45 µA. The component is supplied in tape and reel packaging.

Feature Summary

• Provides precise voltage regulation with a ±2% tolerance for stable performance across varying operating conditions.
• Features a void-free transfer molded thermosetting epoxy body that meets UL94V-0 flammability standards.
• Offers flexible axial-lead mounting terminals suitable for standard through-hole assembly processes.

Applications

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

Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm tolerance and packaging details. Ensure compatibility with existing thermal management requirements, as the plastic package has distinct thermal resistance characteristics compared to glass-body options. Confirm RoHS compliance status if required by project specifications.

Selection Notes

Select this component when a 20V reference with high precision is required in a through-hole design. The plastic construction offers lower thermal resistance than glass equivalents. Consider the ±2% tolerance requirement carefully, as it differs from standard 5% or 10% variants. Verify that the 1W power dissipation rating aligns with the circuit's thermal environment.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes manufactured by Microsemi (now Microchip). The series provides a wide selection of voltages from 3.3V to 100V. The 'C' suffix specifically denotes the tighter ±2% voltage tolerance, while 'TR12' indicates the tape and reel packaging format.

Replacement Considerations

Equivalent parts include other 20V Zener diodes with ±2% tolerance and 1W power rating in DO-41 packages. Verify pinout compatibility and thermal characteristics before substitution. Consult manufacturer cross-reference lists for confirmed alternatives.