1N4731ATR

Overview

The onsemi 1N4731ATR is a single-channel general-purpose Zener diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 4.3 V with a 5% tolerance and a maximum power dissipation of 1 W. The device operates within a temperature range of -65°C to +200°C, drawing a test current of 58 mA. Key electrical specifications include a maximum Zener impedance of 9 Ω and a maximum reverse leakage current of 10 μA.

Feature Summary

• Provides stable voltage regulation for general electronic applications
• Capable of handling high thermal loads up to 200°C junction temperature
• Utilizes a robust glass encapsulated DO-41 package for reliable through-hole mounting

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in power supply designs
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific manufacturer origin, as the 1N4731ATR designation may be sourced from various semiconductor producers including Rectron or Vishay under similar part numbers. Confirm that the component matches the required DO-41 package dimensions and electrical tolerances specified in the design documentation before finalizing procurement orders.

Selection Notes

Select this component when a standard 4.3 V regulation point is needed in a through-hole configuration. Ensure the circuit design accommodates the 58 mA test current requirement for accurate voltage maintenance. Consider the 1 W power rating against expected thermal conditions to prevent overheating during continuous operation.

Part Context

This component belongs to the widely recognized 1N47 series of Zener diodes, which offers an extensive selection of voltage ratings from 3.3 V to 100 V. The 1N4731 variant specifically targets low-voltage regulation needs within this family, providing a standardized solution for designers requiring reliable performance in discrete semiconductor applications.

Replacement Considerations

Compatible substitutes include the 1N4731A-B from Rectron and the 1N4731A-TR from Vishay Semiconductors. These alternatives share identical electrical characteristics and DO-41 packaging, ensuring direct interchangeability in existing circuit layouts without modification.