1N4744UR-1/TR

Overview

The Microchip Technology 1N4744UR-1/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB MELF package. It provides a nominal Zener voltage of 15 V with a standard tolerance of ±10%. Electrical characteristics include a test current of 17 mA, maximum dynamic impedance of 14 Ohms at IZT, and a maximum reverse current of 5 µA at 11.4 V. The device supports a maximum regulator current of 61 mA and operates within a temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed glass MELF package for high reliability applications
• Surface mount design suitable for high density mounting
• Inherently radiation hard per MicroNote 050

Applications

• Voltage regulation in high density circuits
• High reliability applications requiring source control drawings
• Low parasitic requirement environments

Procurement Notes

Verify the specific suffix configuration against official documentation to confirm tolerance and packaging details. Confirm RoHS compliance status if required by the application. Ensure the ordering part number matches the exact electrical parameters and mechanical outline specified in the datasheet before procurement.

Selection Notes

Select this component for applications requiring a 15 V reference in a surface mount form factor. The DO-213AB package offers a leadless profile ideal for space-constrained designs. Consider the ±10% tolerance and thermal derating curves when designing the circuit to ensure stable operation across the specified temperature range.

Part Context

This device belongs to the 1N4728UR thru 1N4764AUR series of surface mount 1.0 W glass Zener diodes. It is electrically equivalent to the JEDEC registered 1N4728A thru 1N4764A axial-leaded series but utilizes the DO-213AB surface mount outline. The series covers Zener voltages from 3.3 V to 100 V.

Replacement Considerations

The 1N4744A is the axial-leaded equivalent. Surface mount equivalents include SMAJ4744A.