1N4745AH

Overview

The 1N4745AH is a single silicon planar Zener diode manufactured by Taiwan Semiconductor in the DO-41 axial leaded package. It provides 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 a temperature range of -55 °C to +150 °C. Key electrical characteristics include a maximum reverse leakage current of 5 µA and a Zener impedance of 16 Ω at a test current of 15.5 mA. The component is qualified under AEC-Q101 standards for automotive applications.

Feature Summary

• Hermetically sealed glass construction for enhanced environmental stability
• AEC-Q101 qualification ensuring reliability for automotive electronic systems
• High thermal stability supporting operation up to 150 °C junction temperature

Applications

• Voltage regulation in automotive electronic control units
• Clipping circuits requiring stable reference voltages
• Overvoltage protection stages in harsh environment electronics

Procurement Notes

Verify RoHS compliance and REACH SVHC status directly with the manufacturer or authorized distributors, as these attributes are listed as detailed rather than explicitly confirmed in the provided data. Confirm the specific suffix 'H' denotes the Ammo Pack packaging format. Ensure the AEC-Q101 qualification is valid for the intended automotive application requirements before finalizing procurement.

Selection Notes

Select this component when a 16 V Zener reference is required in an axial through-hole package. The 1 W power rating and wide operating temperature range make it suitable for industrial and automotive environments. Verify that the 16 Ω dynamic impedance meets the circuit's noise and regulation specifications compared to lower impedance alternatives.

Part Context

This part belongs to the 1N47xxA series of high-power Zener diodes. It shares the standard JEDEC DO-41 footprint with other variants in the series, differing primarily in breakdown voltage and specific manufacturing suffixes. The 1N4745AH variant specifically targets the 16 V segment with automotive-grade reliability features.

Replacement Considerations

Cross-reference with 1N4745A from other manufacturers such as onsemi or Microchip Technology. Verify that substitute parts match the 16 V nominal voltage, 1 W power dissipation, and DO-41 package dimensions. Check if the replacement offers equivalent AEC-Q101 qualification if automotive usage is required.