1N4731A_T50R

Overview

The onsemi 1N4731A_T50R is a single silicon Zener diode with a nominal voltage of 4.3 V and a 5% tolerance. It operates in the DO-41 glass axial package, dissipating up to 1.0 W at lead temperatures below 50°C. The device features a maximum dynamic impedance of 9 Ω at a test current of 58 mA and a leakage current of 10 µA at 1 V. It supports an operating and storage temperature range from -65°C to +200°C.

Feature Summary

• Provides stable voltage regulation within a 5% tolerance band for precision circuit applications
• Utilizes hermetically sealed glass encapsulation for robust environmental protection
• Supports high thermal stability across a wide operating and storage temperature range

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in power supplies
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific T50R suffix against official documentation to confirm reel packaging specifications. Ensure the component matches the required DO-41 form factor and glass construction. Confirm RoHS compliance status if restricted substances are mandated by the end application standards.

Selection Notes

Select this component when a 4.3 V regulation point is required with tight 5% tolerance. The DO-41 package suits through-hole designs needing high thermal endurance. Verify that the 1.0 W power dissipation rating aligns with the expected load conditions and ambient temperature derating requirements.

Part Context

This part belongs to the 1N4728A through 1N4758A series of one-watt Zener diodes manufactured by onsemi. The series covers a broad voltage spectrum from 3.3 V to 100 V, providing standardized options for various regulation needs while maintaining consistent physical dimensions and electrical characteristics across the lineup.

Replacement Considerations

Cross-reference with other manufacturers' 1N4731A equivalents in the DO-41 package. Ensure substitute parts meet the same 4.3 V nominal voltage, 5% tolerance, and 1.0 W power dissipation ratings.