1N4739AUR/TR

Overview

The Microchip Technology 1N4739AUR/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB MELF package. It provides a nominal Zener voltage of 9.1 V with a standard tolerance of +/- 5%. Electrical characteristics are defined at a test current of 28 mA, featuring a maximum dynamic impedance of 5.0 Ohms and a maximum reverse current of 10 µA at 7 V. The device supports a maximum regulator current of 0.5 A and operates within a temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed glass MELF package for high reliability
• Surface mount design suitable for high density mounting
• Electrically equivalent to JEDEC registered axial leaded series

Applications

• Voltage regulation in high density circuitry
• Applications requiring low parasitic parameters
• High reliability systems specified by source control drawings

Procurement Notes

Verify that the specific ordering suffix matches the required screening level and terminal plating configuration. Confirm the tape and reel specifications align with automated assembly equipment requirements. Ensure the component meets all necessary environmental compliance standards for the intended deployment region.

Selection Notes

Select this component when a surface mount solution is required that maintains electrical equivalence to traditional axial leaded Zener diodes. The hermetic glass construction makes it suitable for environments demanding high reliability and radiation hardness. Verify thermal derating curves against the specific PCB footprint and ambient operating conditions.

Part Context

This part belongs to the 1N4728AUR through 1N4764AUR series of surface mount Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers a wide selection of voltages from 3.3V to 100V in a leadless DO-213AB package, providing an alternative to the standard 1N4728A through 1N4764A axial equivalents.

Replacement Considerations

The 1N4739A is the electrically equivalent axial leaded counterpart.