1N4743AUR-1E3

Overview

The 1N4743AUR-1E3 is a hermetically sealed glass MELF Zener diode manufactured by Microchip Technology. It features a 13V nominal Zener voltage with a 5% tolerance and a 1W power dissipation rating. The component utilizes silicon technology in a DO-213AB (MELF-2) package, offering high reliability for demanding environments. It operates within a temperature range of -65°C to +175°C and complies with RoHS standards.

Feature Summary

• Hermetically sealed glass construction ensures environmental protection and long-term stability.
• High thermal capability supports operation at elevated temperatures up to 175°C.
• Single unidirectional configuration provides precise voltage regulation.
• Lead-free compliant packaging meets modern environmental directives.

Applications

• Voltage reference circuits requiring high stability
• Overvoltage protection in harsh environments
• Precision clipping and clamping applications

Procurement Notes

Verify the specific suffix '1E3' confirms lead-free compliance and hermetic sealing status against the official datasheet. Confirm the manufacturer designation as Microchip Technology or its predecessor entities like Microsemi. Ensure the DO-213AB package dimensions match the design requirements. Check for any military screening prefixes if higher reliability grades are needed.

Selection Notes

Select this component when hermetic sealing is mandatory for radiation or extreme temperature resistance. The 1W power rating suits moderate current regulation tasks. Compare the 13V Zener voltage against circuit requirements. Consider the MELF package for automated surface-mount assembly while maintaining through-hole-like robustness.

Part Context

This part belongs to the 1N47xx series of 1-watt Zener diodes. The 'AUR' indicates an automotive or high-reliability grade variant, while '-1E3' specifies the lead-free and halogen-free material composition. It is distinct from plastic-encapsulated versions like the 1N4743A, offering superior hermeticity.

Replacement Considerations

JAN1N4743AUR-1 is a confirmed substitute part number sharing identical electrical specifications and hermetic glass MELF construction. Verify that the substitute maintains the required military screening levels if applicable.