1N4744ATR

Overview

The onsemi 1N4744ATR is a single-channel general-purpose Zener diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 15 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 maximum reverse leakage current of 5 µA, a maximum Zener impedance of 14 Ω, and a test current of 17 mA.

Feature Summary

• Provides stable voltage regulation via Zener breakdown characteristics for circuit protection and reference applications.
• Utilizes a robust glass-passivated silicon junction designed for high thermal stability and reliability.
• Engineered for through-hole mounting to facilitate integration into standard printed circuit board layouts.

Applications

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

Procurement Notes

Verify the manufacturer marking and date code against official onsemi documentation to ensure authenticity. Confirm that the DO-41 package dimensions and lead specifications match the design requirements. Check for any specific environmental compliance certifications required by the target application standards before finalizing procurement.

Selection Notes

Select this component when a 15 V regulation point is required with a 1 W power rating in a through-hole format. Ensure the operating environment stays within the specified -65°C to +200°C range. Compare the 14 Ω impedance and 5 µA leakage against system sensitivity requirements to confirm suitability for the intended signal or power path.

Part Context

This part belongs to the 1N47 series of axial-leaded Zener diodes manufactured by onsemi. The series is widely recognized for providing reliable voltage regulation in industrial and consumer electronics. The 1N4744ATR variant specifically targets the 15 V segment of this lineup, offering standardized performance for general-purpose applications requiring through-hole assembly.

Replacement Considerations

Cross-reference with other manufacturers' 1N4744A equivalents to verify pinout compatibility and electrical parameter alignment. Ensure substitute parts meet the same DO-41 mechanical constraints and thermal ratings if direct replacement is necessary.