1N4744A

Overview

The Microchip Technology 1N4744A is a single silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 15 V with a tolerance of 5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 14 Ohms, and a test current of 17 mA. It utilizes the DO-41-2 through-hole package.

Feature Summary

• Provides stable voltage regulation using silicon planar technology
• Supports high-temperature operation up to 175°C
• Features low reverse leakage current for efficient performance

Applications

• Voltage reference circuits
• Overvoltage protection systems
• Power supply regulation

Procurement Notes

Verify the specific manufacturer source, as the 1N4744A designation is utilized by multiple vendors including Nexperia and Vishay. Confirm that the selected component matches the required DO-41 package and 1W power rating specifications. Ensure compliance with RoHS requirements if applicable to the project constraints before finalizing procurement.

Selection Notes

Select this component when a 15 V regulation point is required in through-hole designs. Consider the 1 W power dissipation limit and ensure adequate thermal management. Verify compatibility with the target circuit's operating temperature range, specifically noting the extended upper limit of 175°C available from certain manufacturers.

Part Context

This component belongs to the standard Zener diode category, widely used for basic voltage clamping and reference tasks. The 1N4744A variant specifically targets the 15 V segment of the industry-standard numbering system. It serves as a fundamental discrete semiconductor element in analog and mixed-signal electronic assemblies.

Replacement Considerations

Direct substitutes include the 1N4744ATR from onsemi. Cross-vendor equivalents such as those from Nexperia or Vishay may be considered provided they match the 15 V nominal voltage, 1 W power rating, and DO-41 package form factor.