1N4743CE3/TR13

Overview

The Microchip Technology 1N4743CE3/TR13 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation at a nominal Zener voltage of 13 V with 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 regulation circuits requiring precise tolerance
• Power supply reference designs
• Protection against overvoltage transients in low-power systems

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'e3' indicates RoHS compliance, 'C' denotes the ±2% voltage tolerance, and 'TR13' specifies tape and reel packaging. Confirm the manufacturer source, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the datasheet version aligns with current manufacturing requirements.

Selection Notes

Select this component when a 13 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 maximum regulator current and dynamic impedance characteristics for circuit stability under varying load conditions.

Part Context

This device belongs to the JEDEC registered 1N4728A through 1N4764A series of silicon Zener diodes. The series covers a wide voltage selection from 3.3 to 100 volts. The specific part utilizes a plastic encapsulation option, designated by the 'P' suffix in the base model, which provides improved thermal performance over traditional glass-body variants.

Replacement Considerations

Compatible replacements include other 1N4743 variants with matching voltage and tolerance, such as 1N4743A (±5% tolerance) or 1N4743D (±1% tolerance). Surface mount equivalents like SMAJ4743A are available for PCB space-constrained designs.