1N4740UR/TR

Overview

The Microchip Technology 1N4740UR/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB MELF package. It provides a nominal Zener voltage of 10 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 10 µA at 7.6 V. Electrical characteristics include a dynamic impedance of 7 Ω at a test current of 25 mA, a knee impedance of 7.6 Ω at 1 mA, and a maximum regulator current of 91 mA.

Feature Summary

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

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 screening levels. Confirm RoHS compliance status if required by project specifications. Ensure the ordering part number matches the intended JEDEC registration equivalent. Check for availability of alternative prefixes for military screening options.

Selection Notes

Select this component for applications requiring a 10 V reference in a surface mount form factor. The DO-213AB package offers a leadless profile ideal for space-constrained layouts. Consider the wide operating temperature range and radiation hardness for demanding environments. Verify thermal derating requirements based on the specific mounting footprint and ambient conditions.

Part Context

This device belongs to the 1N4728UR through 1N4764AUR series of surface mount 1.0 W glass Zener diodes. It is electrically equivalent to the 1N4728A through 1N4764A registration in the DO-41 axial-leaded package but utilizes the DO-213AB outline. The series covers Zener voltages from 3.3 V to 100 V with various tolerance options.

Replacement Considerations

The 1N4740AUR is the direct electrical equivalent without the tape and reel suffix. The MLL4740A is an alternate name for this series. Surface mount equivalents are available as SMAJ4740A.