1N4744CPE3/TR12

Overview

The Microchip Technology 1N4744CPE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 axial-lead package. It provides voltage regulation with a nominal Zener voltage of 15 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-compliant annealed matte-tin plating on its terminals.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage reference circuits requiring precise regulation
• Power supply protection and overvoltage clamping
• General-purpose voltage regulation in electronic equipment

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'P' indicates plastic construction, 'e3' confirms RoHS compliance, and 'TR' denotes tape and reel packaging. Confirm the 'C' suffix corresponds to the necessary ±2% voltage tolerance. Ensure the component meets the specified moisture classification level and thermal requirements for the intended application environment.

Selection Notes

Select this component when a 15 V Zener voltage with high precision (±2%) is required in a 1-watt power dissipation class. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the RoHS-compliant tin-plated terminals for lead-free assembly processes and verify compatibility with the required surge current and dynamic impedance parameters.

Part Context

This part belongs to the widely used 1N47xxA series of 1-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers an extensive voltage selection from 3.3 to 100 volts. The specific variant utilizes a plastic encapsulated body, which provides improved thermal performance relative to traditional glass packages while maintaining JEDEC registration standards.

Replacement Considerations

Surface mount equivalents are available as SMAJ4744A or MLL4744A. Glass-body versions exist under the G suffix designation. Military screening levels can be obtained by adding MQ, MX, MV, or MSP prefixes to the base part number.