1N4743A

Overview

The onsemi 1N4743A is a single-channel general-purpose Zener diode housed in the DO-41 through-hole package. It provides a nominal Zener voltage of 13 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65 °C to +200 °C. Key electrical parameters include a test current of 19 mA, a maximum reverse leakage current of 5 µA, and a Zener impedance of 10 Ohms.

Feature Summary

• Provides stable voltage regulation for general-purpose applications
• Features low thermal resistance plastic encapsulation
• Designed for robust operation across extended temperature ranges

Applications

• Voltage reference circuits
• Overvoltage protection
• Clipping and clamping circuits

Procurement Notes

Verify the specific manufacturer suffix against official datasheets to confirm exact electrical tolerances and packaging variations. Ensure compliance with RoHS and REACH requirements relevant to the target market. Confirm lead times and availability directly with authorized distributors as supply chain conditions vary by region and volume.

Selection Notes

Select this component when a standard 13 V regulation point is required in through-hole designs. Consider the 1 W power rating and DO-41 package dimensions for board layout constraints. Evaluate the 5% voltage tolerance against circuit sensitivity requirements before finalizing the design.

Part Context

This part belongs to the widely used 1N47 series of silicon Zener diodes manufactured by onsemi. These components are standardized JEDEC devices designed for reliable voltage regulation in consumer and industrial electronics. The 1N4743A specifically addresses the 13 V segment of this extensive product family.

Replacement Considerations

Cross-reference with other manufacturers' 1N4743A equivalents such as those from Rectron, PANJIT, or Microsemi (MV1N4743APE3). Verify that substitute parts match the DO-41 package, 1 W power rating, and 13 V Zener voltage specifications.