1N4749ATR

Overview

The onsemi 1N4749ATR is a single general-purpose Zener diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 24 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 10.5 mA, a maximum Zener impedance of 25 Ω, and a maximum reverse leakage current of 5 μA.

Feature Summary

• Provides stable voltage regulation at a nominal 24 V level for circuit protection and reference applications.
• Capable of handling up to 1 W of power dissipation in a standard axial leaded package.
• Designed for reliable operation across an extended industrial temperature range.

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement systems

Procurement Notes

Verify the specific suffix 'ATR' against the manufacturer's official datasheet to confirm packaging details, as generic part numbers may not reflect tape-and-reel specifications. Ensure the component meets RoHS compliance requirements for your region. Cross-reference the exact part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when a precise 24 V regulation point is required with moderate power handling capabilities. The DO-41 package suits through-hole assembly processes. Consider the 5% voltage tolerance and 25 Ω impedance for precision requirements. Verify thermal management needs given the 1 W rating and operating temperature limits.

Part Context

This component belongs to the 1N47 series of Zener diodes manufactured by onsemi. The series offers various voltage ratings in the DO-41 package. The 1N4749A variant specifically targets the 24 V market segment. The ATR suffix typically indicates a specific packaging configuration, such as tape and reel, distinct from bulk packaging variants.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4749A parts or equivalent 24 V 1 W Zener diodes in the DO-41 package. Ensure replacement parts match the 24 V nominal voltage, 1 W power rating, and ±5% tolerance. Verify that alternative packages maintain the same pinout and thermal characteristics.