1N4732A_T50R

Overview

The onsemi 1N4732A_T50R is a single silicon Zener diode housed in the DO-41 axial through-hole package. It provides a nominal Zener voltage of 4.7 V with a tolerance of ±5%. The device dissipates up to 1.0 W at lead temperatures below 50°C, derating by 6.67 mW/°C above that threshold. Electrical characteristics include a maximum Zener impedance of 8 Ω at a test current of 53 mA and a maximum leakage current of 10 µA at 1 V reverse bias. Non-repetitive peak reverse surge current reaches 970 mA. Operating and storage temperature ranges span from -65°C to +200°C.

Feature Summary

• Provides stable voltage regulation via Zener breakdown mechanism within specified thermal limits
• Features built-in strain relief for mechanical robustness during soldering and operation
• Utilizes glass encapsulation to ensure high stability and hermetic sealing

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in power supply inputs
• Clamping applications for transient suppression

Procurement Notes

Verify the specific T50R suffix against official documentation to confirm packaging configuration, as standard datasheets may not detail tape-and-reel specifications. Ensure compliance with RoHS directives if required by the target application environment. Cross-reference manufacturer part numbers to confirm equivalence with legacy designations.

Selection Notes

Select this component when a 4.7 V regulation point is required in a through-hole assembly process. The DO-41 package accommodates standard PCB drilling patterns. Evaluate thermal management requirements carefully, as power dissipation capabilities decrease significantly above 50°C ambient or lead temperatures.

Part Context

This component belongs to the 1N47 series of one-watt Zener diodes manufactured by onsemi. The series covers a wide voltage range from 3.3 V to 100 V, sharing common mechanical dimensions and electrical testing methodologies. The 1N4732A specifically targets the lower end of this voltage spectrum, offering tight tolerance control for precision analog and digital circuitry.

Replacement Considerations

Equivalent parts include the Nexperia 1N4732A and Microchip 1N4732A. Verify pinout compatibility and package dimensions before substitution. Confirm that replacement devices meet the same 1 W power dissipation and ±5% voltage tolerance requirements.