1N4744A

Overview

The onsemi 1N4744A is a single-channel general-purpose 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 from -65°C to +200°C. Packaged in the DO-41 through-hole format, it exhibits a maximum reverse leakage current of 5 μA and a Zener impedance of 22 Ω at a test current of 12.5 mA.

Feature Summary

• Provides stable voltage regulation using silicon unidirectional technology
• Features hermetically sealed glass construction for corrosion resistance
• Supports high thermal stability with an extended operating temperature range

Applications

• Voltage reference circuits
• Overvoltage protection systems
• General-purpose voltage regulation

Procurement Notes

Verify the manufacturer origin carefully, as multiple vendors including Vishay and Diodes Inc produce this part number. Confirm package details such as DO-41 or DO-204AL variants match design requirements. Ensure compliance with specific environmental standards if required by the application. Cross-reference datasheets for exact electrical tolerances before integration.

Selection Notes

Select this component when a 15 V regulated supply is needed in a through-hole configuration. Consider the 1 W power rating for thermal management in the circuit design. Verify that the ±5% tolerance meets the precision requirements of the target application. Check compatibility with existing PCB footprints for the DO-41 package.

Part Context

This component belongs to the 1N47 series of Zener diodes, widely used for basic voltage regulation tasks. The 1N4744A specifically targets the 15 V segment of this family. It is commonly found in industrial and consumer electronics where reliable, low-cost voltage clamping is necessary.

Replacement Considerations

Compatible substitutes include Vishay 1N4744A and Diodes Inc 1N4744A-13. These alternatives share identical electrical specifications and mechanical dimensions. Verify pinout orientation and package type before substitution.