1N4743ATR

Overview

The Fairchild Semiconductor 1N4743ATR is a single-channel general-purpose Zener diode designed for voltage regulation and reference 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 -65°C to 200°C. Packaged in the DO-41 axial leaded format, it utilizes silicon as the semiconductor material. Key electrical characteristics include a test current of 19 mA, a maximum Zener impedance of 10 Ω, and a maximum reverse leakage current of 5 μA.

Feature Summary

• Provides stable voltage regulation using a single silicon junction structure
• Capable of handling high thermal loads with an extended operating temperature range up to 200°C
• Offers precise voltage tolerance for reliable circuit referencing

Applications

• Voltage regulation in power supply circuits
• Voltage reference components in electronic systems
• Overvoltage protection stages

Procurement Notes

Verify that the ordering suffix 'ATR' corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm that the component meets all necessary environmental compliance standards applicable to the target market. Ensure the supplier provides valid traceability documentation for the silicon material and manufacturing origin to maintain quality assurance protocols.

Selection Notes

Select this component when a 13 V regulation point is required with a 1 W power rating. The DO-41 package is suitable for through-hole mounting on standard PCBs. Consider the 10 Ω impedance specification for dynamic load variations. Evaluate the -65°C to 200°C temperature range against the operational environment requirements to ensure long-term reliability under thermal stress conditions.

Part Context

This part belongs to the 1N47 series of Zener diodes manufactured by Fairchild Semiconductor. The series offers various voltage ratings within the same DO-41 package form factor. The 1N4743 variant specifically targets the 13 V segment, providing a standardized solution for discrete voltage regulation tasks in consumer and industrial electronics.

Replacement Considerations

Equivalent parts from other manufacturers must match the 13 V nominal voltage, 1 W power rating, and DO-41 package dimensions. Verify that substitute components meet the same ±5% tolerance and 10 Ω impedance specifications to ensure circuit compatibility.