1N4623UR-1

Overview

The Microchip Technology 1N4623UR-1 is a Zener voltage regulator diode designed for surface-mount applications. It features a nominal Zener voltage of 4.3 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500 mW and utilizes the DO-213AA (SMB) package. Key electrical characteristics include a maximum dynamic impedance of 1600 Ohms and a reverse leakage current of 2 µA at 2 V. The component supports an operating junction temperature range from -65°C to 175°C.

Feature Summary

• Surface-mount construction in a DO-213AA package
• Internal metallurgical bond for enhanced reliability
• Qualified for high-reliability military applications

Applications

• Military aerospace systems
• High-reliability voltage regulation circuits
• Precision reference voltage sources

Procurement Notes

Verify that the specific suffix UR-1 corresponds to the required surface-mount configuration and internal metallurgical bonding. Confirm compliance with MIL-PRF-19500/435 standards if the application demands military-grade qualification. Ensure the procurement channel provides traceability documentation consistent with high-reliability requirements.

Selection Notes

Select this component when a surface-mount Zener diode with high thermal stability and low noise is required. The 4.3 V rating suits precision reference applications. Consider the DO-213AA footprint constraints and the need for internal metallurgical bonding to ensure performance under rigorous environmental conditions compared to standard commercial equivalents.

Part Context

This part belongs to the 1N4623 series of Zener diodes manufactured by Microchip Technology. It is functionally equivalent to other industry-standard 4.3 V Zener regulators but offers specific packaging and reliability enhancements suitable for demanding environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data.