1N4743A

Overview

The SMC Diode Solutions 1N4743A is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 13 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range of -55 °C to +150 °C junction temperature. Packaged in the DO-214AB (SMC) surface-mount format, it provides reliable performance in compact circuit designs requiring stable reference voltages.

Feature Summary

• Provides precise voltage regulation with a 13 V nominal breakdown voltage
• Engineered for high thermal stability up to 150 °C junction temperature
• Utilizes a robust surface-mount DO-214AB package for automated assembly

Applications

• General-purpose voltage regulation circuits
• Voltage reference sources in electronic systems
• Overvoltage protection stages

Procurement Notes

Verify the specific manufacturer designation when sourcing, as the 1N4743A part number is widely produced by multiple semiconductor vendors including onsemi, Microsemi, and Rectron. Confirm that the supplier explicitly identifies SMC Diode Solutions as the originator to ensure component traceability and adherence to their specific manufacturing standards and quality controls.

Selection Notes

Select this component for designs requiring a standard 13 V regulation point in a surface-mount footprint. Ensure the PCB layout accommodates the DO-214AB dimensions and that the thermal management strategy supports the 1 W power dissipation rating at the expected ambient operating temperatures.

Part Context

This component belongs to the industry-standard 1N47xx series of 1-watt Zener diodes. While the electrical characteristics are standardized across manufacturers, physical dimensions and packaging may vary slightly between suppliers such as SMC Diode Solutions, onsemi, and Microsemi. The DO-214AB package offers a smaller profile compared to traditional axial leads.