1N4745A-T50A

Overview

The onsemi 1N4745A-T50A is a single-channel general-purpose Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 16 V with a tolerance of ±5%. The device supports a maximum steady-state power dissipation of 1 W and operates within an extended temperature range from -65 °C to +200 °C. Packaged in the DO-41 axial leaded format, it exhibits a maximum reverse leakage current of 5 µA and a dynamic impedance of 16 Ω at the specified test current.

Feature Summary

• Hermetically sealed glass construction ensures reliable performance in demanding environments.
• Extended thermal capability allows operation up to +200 °C junction temperature.
• Low leakage current characteristics support stable voltage reference applications.

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement instruments

Procurement Notes

Verify the specific suffix T50A against the manufacturer's official documentation to confirm packaging configuration and compliance status. Ensure the ordered part matches the required DO-41 package dimensions and lead form. Cross-reference the datasheet revision date to validate electrical parameters before integration into design specifications.

Selection Notes

Select this component when high-temperature stability and hermetic sealing are required for voltage regulation. The 16 V rating suits mid-range reference needs, while the 1 W power dissipation accommodates moderate current loads. Confirm that the DO-41 through-hole package aligns with the target PCB layout constraints and assembly processes.

Part Context

This device belongs to the standard 1N47xx series of Zener diodes, widely utilized for basic voltage clamping and regulation tasks. The 1N4745A variant specifically targets the 16 V segment of this family. The T50A suffix typically denotes a specific bulk or tape-and-reel packaging option provided by onsemi for automated assembly or manual insertion workflows.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4745A parts such as Fairchild Semiconductor 1N4745A_T50A or Microchip Technology 1N4745A/TR. Verify pinout compatibility and ensure equivalent thermal derating curves are observed when swapping between different brand implementations of this JEDEC standard.