1N4745A-T

Overview

The Vishay General Semiconductor - Diodes Division 1N4745A-T is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 16 V with a tolerance of 5%. The device operates in the DO-41 axial leaded package and supports a maximum steady-state power dissipation of 1 W at temperatures up to 50°C, with derating required above this threshold. Key electrical characteristics include a maximum reverse leakage current of 5 uA and a Zener impedance of 16 Ohms at a test current of 15.5 mA. The component is rated for an operating temperature range from -65°C to +200°C.

Feature Summary

• Utilizes hermetically sealed glass construction for robust environmental protection
• Provides stable voltage regulation through precise Zener breakdown characteristics
• Supports high thermal stability with extended junction temperature ratings

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• General-purpose clipping and clamping applications

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact power rating and packaging configuration. Datasheets may vary between 1 W and 1.3 W ratings depending on the specific revision or distributor listing. Ensure compliance with RoHS and REACH requirements by checking the latest product specification sheet before finalizing procurement orders.

Selection Notes

Select this component when an axial leaded form factor is required for through-hole mounting. The 16 V breakdown voltage suits low-voltage regulation tasks. Consider the 16 Ohm dynamic impedance for noise-sensitive designs. Verify that the 1 W power dissipation capability aligns with the thermal management strategy of the target circuit design.

Part Context

This part belongs to the standard 1N47xxA series of Zener diodes manufactured by Vishay. The series offers a wide range of voltage values in the DO-41 package. The 'T' suffix typically indicates tape and reel packaging for automated assembly processes, distinguishing it from bulk packaged equivalents within the same family.

Replacement Considerations

Compatible substitutes include the 1N4745A from onsemi and Fairchild Semiconductor. Cross-reference specifications carefully as power ratings may differ between manufacturers. Ensure the replacement maintains the DO-41 footprint and 16 V Zener voltage tolerance.