1N4746CPE3/TR8

Overview

The Microchip Technology 1N4746CPE3/TR8 is a silicon 1-watt Zener diode with an 18 V nominal voltage and ±2% tolerance. It operates in the -65°C to +150°C range, featuring a plastic DO-41 package. The device provides voltage regulation across broad current and temperature ranges, with a maximum dynamic impedance of 20 Ohms at a test current of 14 mA.

Feature Summary

• Provides precise voltage regulation with tight ±2% tolerance
• Features a void-free transfer molded thermosetting epoxy body
• Offers flexible axial-lead mounting terminals for through-hole installation
• Ensures non-sensitivity to electrostatic discharge

Applications

• Voltage regulation circuits
• Power supply protection
• Reference voltage generation

Procurement Notes

Verify the specific manufacturer origin, as the part number indicates Microchip Technology but the source datasheet is from Microsemi. Confirm RoHS compliance status and tape-and-reel packaging details directly with the supplier or manufacturer documentation before procurement.

Selection Notes

Select this component when a stable 18 V reference with high precision is required. The plastic construction offers lower thermal resistance compared to glass-body options. Ensure the application supports the 1 W power dissipation rating and axial lead mounting style.

Part Context

This part belongs to the 1N47xx series of 1-watt Zener diodes. The 'C' suffix denotes a tighter ±2% voltage tolerance, while 'P' indicates plastic encapsulation. The 'e3' suffix signifies RoHS compliance, and 'TR' identifies the tape-and-reel packaging format.

Replacement Considerations

Compatible substitutes include other 1N4746 variants with matching electrical characteristics. Verify that replacement parts maintain the same 18 V nominal voltage, 1 W power rating, and ±2% tolerance requirements.