1N4740CPE3/TR8

Overview

The Microchip Technology 1N4740CPE3/TR8 is a silicon Zener diode rated for 1.0 watts of power dissipation, housed in a plastic DO-41 axial lead package. It provides voltage regulation with a nominal Zener voltage of 10 V and a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and features RoHS compliance via the 'e3' suffix. Packaged in tape and reel format per EIA-296 standards as denoted by the 'TR8' suffix, it offers flexible mounting terminals and void-free epoxy encapsulation.

Feature Summary

• Provides precise voltage regulation with a standard 10% tolerance or tighter options like ±2% and ±1% available via specific suffixes.
• Features a void-free transfer molded thermosetting epoxy body that meets UL94V-0 flammability ratings.
• Offers flexible axial-lead mounting terminals compatible with through-hole assembly processes.
• Includes RoHS compliant devices available with an 'e3' suffix indicating annealed matte-Tin plating.

Applications

• Voltage regulation over broad operating current and temperature ranges
• General purpose clipping and clamping circuits
• Reference voltage sources in electronic systems

Procurement Notes

Verify the complete part number against official manufacturer documentation to confirm specific electrical tolerances and packaging configurations. Ensure compatibility with existing circuit designs regarding thermal resistance and maximum power dissipation limits at elevated temperatures. Confirm RoHS compliance status if required by project specifications.

Selection Notes

Select this component when a 10 V reference with high precision is required in an axial package. The C suffix denotes a 2% tolerance, suitable for applications demanding stricter voltage accuracy than standard 5% or 10% variants. Consider the plastic construction for lower thermal resistance compared to glass-body options.

Part Context

This component belongs to the 1N4728AP thru 1N4764AP series of 1.0 watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix indicates plastic construction, while 'e3' confirms RoHS compliance. These devices are JEDEC registered and offer various military screening levels upon request.

Replacement Considerations

Surface mount equivalents such as SMAJ4740A or MLL4740A are available from the same manufacturer family. Consult factory documentation for other surface mount options or alternative manufacturers offering similar 10 V, 1 W Zener diodes in DO-41 packages.