1N4743A_S00Z

Overview

The onsemi 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 power dissipation of 1 W and operates within a temperature range from -65 °C to +200 °C. Key electrical parameters include a maximum reverse leakage current of 5 uA, a Zener impedance of 10 Ohms, and a test current of 19 mA. It utilizes a DO-41-2 through-hole package.

Feature Summary

• Provides stable voltage regulation at a nominal 13 V level
• Capable of handling 1 W power dissipation in a compact form factor
• Engineered for high-temperature operation up to 200 °C

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation tasks

Procurement Notes

Verify the specific manufacturer designation and suffix against official onsemi documentation to ensure compatibility with design requirements. Confirm RoHS compliance status and REACH SVHC declarations prior to integration. Cross-reference datasheet specifications for thermal resistance and mechanical dimensions to validate fitment within the intended assembly constraints.

Selection Notes

Select this component when a standard 13 V regulation point is required with moderate precision. Consider the DO-41 package for through-hole mounting needs. Evaluate the 1 W power rating against expected operating conditions to ensure adequate thermal headroom. Verify that the 5% voltage tolerance aligns with circuit sensitivity requirements.

Part Context

This part belongs to the widely recognized 1N47xx series of axial leaded Zener diodes. These components are standardized across multiple manufacturers for general-purpose use. The 1N4743A specifically targets the 13 V segment of this extensive lineup, offering a reliable solution for basic voltage clamping and reference applications in consumer and industrial electronics.

Replacement Considerations

Equivalent parts from other manufacturers such as Rectron, Nexperia, or Taiwan Semiconductor may be used if they match the 1N4743A electrical specifications and DO-41 package footprint. Ensure that any substitute maintains the same 13 V nominal voltage, 1 W power rating, and 5% tolerance.