1N4746A_T50R

Overview

The onsemi 1N4746A_T50R is a silicon Zener diode with a nominal voltage of 18 V and a 5% tolerance. It operates in the DO-41 through-hole package, dissipating up to 1 W at lead temperatures below 50°C. The device features a maximum dynamic impedance of 14 Ω at a test current of 20 mA and a leakage current not exceeding 5 µA. It supports an operating temperature range from -65°C to +200°C.

Feature Summary

• Provides stable voltage regulation using a glass-passivated junction design.
• Features high thermal stability for operation in extreme environments.
• Offers precise voltage tolerance for accurate circuit reference applications.

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage generation

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 electrical ratings for your application. Confirm RoHS compliance status directly with the manufacturer or authorized distributor before finalizing procurement.

Selection Notes

Select this component when a standard 18 V reference is needed in a through-hole configuration. Consider the 1 W power dissipation limit and derating requirements above 50°C. Verify that the 14 Ω impedance meets the ripple rejection needs of the target circuit design.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by onsemi. The series utilizes a glass passivation process for enhanced reliability. The 1N4746A variant specifically targets the 18 V segment within this broad family of voltage regulator components.

Replacement Considerations

Cross-reference with other manufacturers' 1N4746A equivalents. Verify pinout compatibility and ensure the replacement part meets the same 1 W power rating and 18 V nominal voltage specifications.