1N4754UR-1

Overview

The 1N4754UR-1 is a high-reliability Zener diode manufactured by Microsemi Corporation. It features a nominal Zener voltage of 39V with a tight tolerance of 1%. The device is rated for a power dissipation of 1W and utilizes silicon as the semiconductor material. It is housed in a hermetically sealed glass MELF-2 package, identified by the JEDEC code DO-213AB. This component is designed for unidirectional applications requiring stable voltage regulation.

Feature Summary

• Hermetically sealed glass construction ensures environmental protection and long-term stability
• Internal metallurgical bond provides enhanced mechanical strength and reliability
• Tight voltage tolerance supports precise regulation requirements
• Single configuration suitable for dedicated voltage reference circuits

Applications

• High-reliability military aerospace systems
• Spacecraft electronic subsystems
• Harsh environment industrial control units

Procurement Notes

Verify that the specific part number includes the required suffixes for intended screening levels. Confirm compliance with relevant military specifications such as MIL-PRF-19500 if applicable to the system design. Ensure the supplier provides traceable documentation for the hermetic seal integrity and metallurgical bonding quality.

Selection Notes

Select this component when a 39V regulation point is required in a surface-mount form factor. The 1% tolerance distinguishes it from standard commercial variants. Consider the 1W power rating against thermal constraints in the final assembly. The DO-213AB package dictates specific footprint and reflow profile requirements during manufacturing.

Part Context

This device belongs to the broader family of Microsemi Zener diodes designed for ruggedized applications. It shares the MELF-2 package style with other high-reliability parts in the series but is distinguished by its specific 39V breakdown voltage and 1W power handling capability. The -1 suffix typically denotes internal metallurgical bonding options similar to military devices.

Replacement Considerations

Direct substitutes include equivalent 39V 1W Zener diodes in the DO-213AB package from qualified vendors. Verify that any replacement maintains the 1% tolerance and hermetic sealing characteristics. Commercial equivalents without the -1 suffix may lack the internal metallurgical bond.