1N4732UR-1

Single Zener Diodes Overview

The 1N4732UR-1 is a high-reliability Zener diode manufactured by Microchip Technology. It features a nominal voltage of 4.7 V with a tolerance of ±10% and a power dissipation rating of 1 W. The device utilizes silicon technology and is housed in a DO-213AB (MELF) glass package. It operates unidirectionally and supports a minimum operating temperature of -65°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF construction for environmental protection
• High reliability design suitable for demanding applications
• Surface mount DO-213AB package format

Single Zener Diodes Applications

• Voltage regulation in high-reliability circuits
• Reference voltage sources in aerospace systems
• Overvoltage protection in military electronics

Single Zener Diodes Procurement Notes

Verify the specific suffix UR-1 to confirm the hermetic seal and high-reliability grade, as standard commercial variants lack these specifications. Confirm RoHS compliance status if required by project constraints, noting that some hermetic variants may differ from lead-free standards. Ensure the DO-213AB footprint matches the PCB design. Check current availability as high-reliability components often have restricted stock or longer lead times compared to general-purpose parts.

Single Zener Diodes Selection Notes

Select this component when a stable 4.7 V reference is required in harsh environments. The DO-213AB package offers robust surface-mount integration. Consider the 1 W power rating for thermal management needs. Verify that the ±10% tolerance meets circuit precision requirements. This part is distinct from non-hermetic versions like the 1N4732A series.

Single Zener Diodes Part Context

This part belongs to Microchip's high-reliability Zener diode portfolio, derived from legacy MIL-SPEC designs. It is functionally similar to the 1N4732DUR but specified with 10% tolerance rather than 1%. The UR-1 designation indicates the specific hermetic MELF configuration.

Single Zener Diodes Replacement Considerations

The MQ1N4732UR-1E3 is a documented equivalent offering identical electrical characteristics and hermetic sealing. Standard commercial equivalents like the 1N4732A lack the hermetic seal and high-reliability certification.