1N4743CPE3/TR8

Overview

The Microchip Technology 1N4743CPE3/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, manufactured by Microsemi's Scottsdale Division. It provides voltage regulation with a nominal Zener voltage of 13 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 a plastic DO-41 (DO-204AL) axial lead package. Electrical characteristics include a maximum dynamic impedance of 10 Ohms at a test current of 19 mA, a maximum reverse current of 5 µA at 9.9 V, and a forward voltage of 1.2 V maximum at 200 mA.

Feature Summary

• Provides precise voltage regulation with a standard 1.0-watt power dissipation capability.
• Features a void-free transfer molded thermosetting epoxy body for mechanical durability.
• Offers flexible axial-lead mounting terminals suitable for through-hole applications.
• Compliant with RoHS directives and classified as Level 1 moisture sensitivity.

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in electronic systems
• General-purpose voltage regulation tasks

Procurement Notes

Verify that the ordering suffix includes 'e3' to confirm RoHS compliance and matte-tin plating. Ensure the 'TR' suffix is present if tape-and-reel packaging is required for automated assembly processes. Confirm the 'C' suffix indicates the specific 2% voltage tolerance needed for the design. Cross-reference the manufacturer designation between Microchip and Microsemi Scottsdale Division to ensure accurate sourcing.

Selection Notes

Select this component when a 13 V Zener voltage with high precision is necessary. The 1W power rating supports higher current loads compared to lower-power variants. The plastic DO-41 package offers lower thermal resistance than glass-body options. Verify that the operating environment stays within the specified -65°C to +150°C temperature range for reliable performance.

Part Context

This part belongs to the JEDEC registered 1N4728A through 1N4764A series of silicon Zener diodes. The 'P' suffix denotes plastic encapsulation, while the 'C' suffix specifies a tighter 2% voltage tolerance compared to the standard 5% or 10% options. The 'e3' suffix indicates environmental compliance, and 'TR' designates the reel packaging format.

Replacement Considerations

Consult factory documentation for surface mount equivalents such as SMAJ4743A or MLL4743A. Other manufacturers may offer compatible parts, but verify that electrical parameters like dynamic impedance and power dissipation match the original specifications.

FAQ

What does the 'C' suffix indicate in the part number?

The 'C' suffix identifies the device as having a tight voltage tolerance of plus or minus 2% on the nominal Zener voltage.

Is the device sensitive to electrostatic discharge?

No, the device is nonsensitive to ESD per MIL-STD-750 Method 1020.