1N4730UR-1

Overview

The 1N4730UR-1 is a hermetically sealed Zener diode manufactured by Microchip Technology. It features a glass MELF (DO-213AB) surface-mount package and provides a nominal Zener voltage of 3.9V with a tolerance of 10%. The device dissipates up to 1W of power and operates within a temperature range of -65°C to +175°C. Constructed from silicon, it offers high reliability suitable for demanding environments.

Feature Summary

• Hermetically sealed glass construction ensures environmental protection
• Surface-mount MELF package design facilitates automated assembly
• High thermal stability supports operation in extreme temperatures

Applications

• Military aerospace circuits requiring radiation resistance
• High-reliability industrial control systems
• Harsh environment communication equipment

Procurement Notes

Verify the specific manufacturer lot traceability and MIL-PRF-19500 screening status upon order confirmation. Confirm that the DO-213AB package dimensions match your PCB footprint requirements. Ensure the supplier provides valid certification documents for hermetic sealing integrity before final acceptance.

Selection Notes

Select this component when a ruggedized surface-mount Zener regulator is required. The 1W dissipation rating allows for robust performance in compact designs. Verify that the 10% voltage tolerance meets your circuit precision needs compared to tighter tolerance axial alternatives.

Part Context

This part belongs to the 1N47 series of Zener diodes produced by Microchip Technology. It serves as the surface-mount equivalent to traditional axial-lead versions, offering similar electrical characteristics in a smaller form factor designed for modern SMT production lines.

Replacement Considerations

Direct substitutes include the 1N4730AUR and 1N4730UR-1TRE3. Verify package compatibility and hermetic sealing requirements when cross-referencing with other manufacturers' MELF devices.