1N4747ATR

Overview

The onsemi 1N4747ATR is a single-channel general-purpose Zener diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 20 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 12.5 mA, a maximum Zener impedance of 22 Ω, and a maximum reverse leakage current of 5 μA.

Feature Summary

• Provides stable voltage regulation at a nominal 20 V level for circuit protection and reference applications.
• Utilizes a robust DO-41 axial leaded package designed for reliable through-hole mounting.
• Engineered for high thermal stability with an extended operating temperature range up to +200°C.

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in analog signal processing

Procurement Notes

Verify the manufacturer part number 1N4747ATR against official onsemi documentation to confirm specifications. Ensure the DO-41 package type matches the target PCB layout requirements. Confirm that the 1 W power rating and 20 V Zener voltage align with the design constraints. Check for any specific ordering suffixes or packaging variations if reel quantities are required.

Selection Notes

Select this component when a standard 20 V regulation point is needed in a through-hole design. The DO-41 package offers mechanical durability suitable for general industrial environments. Consider the 22 Ω impedance and 12.5 mA test current for precise biasing requirements. Verify compatibility with the system's thermal management capabilities given the 1 W dissipation limit.

Part Context

This component belongs to the 1N47 series of Zener diodes manufactured by onsemi. The series is widely recognized for providing reliable voltage regulation in various electronic applications. The 1N4747ATR variant specifically targets the 20 V segment of this lineup, offering consistent performance across the specified temperature range.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4747A parts in DO-41 packages, such as Vishay 1N4747A-TR or Microchip 1N4747AUR (note package difference). Ensure equivalent Zener voltage, power rating, and impedance characteristics before substitution.