1N4739ATR

Overview

The onsemi 1N4739ATR is a single-channel general-purpose Zener diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 9.1 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 28 mA, a maximum Zener impedance of 5 Ω, and a maximum reverse leakage current of 10 μA.

Feature Summary

• Provides stable voltage regulation at a nominal 9.1 V level for circuit protection and reference applications.
• Capable of handling up to 1 W of power dissipation in a standard axial leaded form factor.
• Engineered for reliable operation across an extended industrial temperature spectrum.

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose clipping and clamping configurations

Procurement Notes

Verify the specific suffix designation when ordering, as packaging variations exist between bulk and reel formats. Confirm that the DO-41 through-hole footprint aligns with the target PCB layout requirements. Ensure the selected variant meets the necessary thermal management standards for the intended operating environment.

Selection Notes

Select this component when a 9.1 V regulation point is required with moderate power handling capabilities. The DO-41 package offers robust mechanical stability for manual or automated through-hole assembly processes. Consider the 5% voltage tolerance and 5 Ω impedance characteristics against the specific precision needs of the design.

Part Context

This part belongs to the widely recognized 1N4739A series of silicon Zener diodes manufactured by onsemi. The ATR suffix typically denotes tape and reel packaging suitable for high-volume automated assembly lines. It serves as a standard solution for basic voltage regulation tasks in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4739A variants. Cross-reference with Vishay or NTE equivalents if sourcing constraints apply. Verify that any replacement maintains identical voltage, power, and package specifications.