1N4742CPE3/TR8

Overview

The Microchip Technology 1N4742CPE3/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP to 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial lead package. It provides voltage regulation with a nominal Zener voltage of 12 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 'TR' suffix, it offers flexible mounting terminals and moisture classification Level 1.

Feature Summary

• Provides precise voltage regulation with a standard ±2% tolerance on nominal Zener voltage
• Features a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Offers flexible axial-lead mounting terminals for through-hole applications
• Includes RoHS compliant annealed matte-Tin plating solderable per MIL-STD-750

Applications

• Voltage stabilization circuits requiring broad operating current ranges
• Applications demanding high density and low parasitic requirements
• General purpose voltage regulation over wide temperature ranges

Procurement Notes

Verify that the ordering suffixes align with specific requirements: 'P' indicates plastic construction, 'C' denotes the ±2% voltage tolerance, 'e3' confirms RoHS compliance, and 'TR' specifies tape and reel packaging. Confirm the manufacturer source, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure compatibility with existing JEDEC registered designs referencing the 1N4728A to 1N4764A series.

Selection Notes

Select this component when a 12 V Zener reference requires tighter than standard tolerances. The plastic encapsulation provides lower thermal resistance compared to glass-body options while maintaining moisture sensitivity level 1 without dry pack requirements. Consider the surface mount equivalents SMAJ4742A or MLL4742A if board space constraints necessitate a change in package type.

Part Context

This part belongs to the popular 1N4728AP through 1N4764AP series of 1.0 watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers an extensive voltage selection from 3.3 to 100 volts. While standard devices carry a 5% tolerance, variants with suffixes such as C or D offer tighter specifications of 2% or 1% respectively. These plastic molded Zeners are designed for general-purpose regulation where flexibility and reliability are prioritized.

Replacement Considerations

Surface mount equivalents include SMAJ4742A and MLL4742A. Glass body versions are available with a G suffix, though they exhibit higher thermal resistance. Military screening levels can be obtained by adding prefixes like MQ, MX, MV, or MSP to the base part number.