1N4744UR

Overview

The Microchip Technology 1N4744UR is a surface mount Zener diode designed for voltage regulation applications. It utilizes the DO-213AB package, also known as MELF-2, which provides a hermetically sealed glass construction suitable for high-reliability environments. This component serves as a surface mount equivalent to the registered through-hole 1N4744 device in the DO-41 package. The series offers standard voltage tolerances of plus or minus five percent, with tighter options available down to one percent. It is engineered for high-density circuit designs requiring low parasitic characteristics.

Feature Summary

• Hermetically sealed glass construction ensures durability and suitability for high-reliability applications governed by source control drawings.
• Surface mount design meets JEDEC outline specifications while providing electrical equivalence to traditional through-hole registration devices.
• Internally bonded metallurgical structure enhances reliability for demanding electronic environments.

Applications

• High-density voltage regulation circuits
• Low parasitic requirement applications
• High-reliability systems requiring source control drawing compliance

Procurement Notes

Verify the specific suffix against official datasheets to confirm exact tolerance and screening levels. Confirm package compatibility with PCB footprints. Check current availability status as supply may be restricted. Ensure the selected variant matches the required voltage rating and power dissipation capabilities for the target application.

Selection Notes

Select this component when a surface mount solution is required that maintains electrical performance identical to legacy through-hole parts. Consider the hermetic seal for harsh environments. Evaluate the available tolerance options, ranging from standard five percent to tighter one percent specifications, based on circuit precision requirements.

Part Context

This part belongs to the 1N47xxUR series of 1-watt glass Zener diodes manufactured by Microchip Technology. The series spans various voltage ratings from 1N4728A through 1N4764A. These components are specifically engineered to replace older DO-41 packaged devices in modern surface mount assembly processes without compromising electrical integrity or reliability standards.

Replacement Considerations

The 1N4744URE3TR is a verified substitute offering similar specifications within the same product family. Verify pinout compatibility and thermal management requirements when transitioning between these variants.