1N4679UR-1/TR

Overview

The Microchip Technology 1N4679UR-1/TR is a hermetically sealed surface mount Zener diode designed as the equivalent for the JEDEC registered 1N4678 through 1N4717 series. It features a DO-213AA (SOD-80) package with internal metallurgical bonding. Key electrical specifications include a nominal Zener voltage of 2 V, a power dissipation rating of 500 mW, and a voltage tolerance of ±5%. The device operates within a temperature range of -55 °C to +175 °C and exhibits a maximum reverse leakage current of 5 µA.

Feature Summary

• Hermetically sealed glass MELF package ensuring environmental stability
• Internal metallurgical bond construction for enhanced reliability
• Surface mount form factor compatible with automated assembly processes

Applications

• Voltage regulation in military aerospace systems
• Overvoltage protection circuits requiring high reliability
• Reference voltage generation in harsh environment electronics

Procurement Notes

Verify that the specific order includes the UR-1 suffix to ensure the component meets hermetic sealing requirements. Confirm compliance with MIL-PRF-19500 standards if applicable to your system. Request batch traceability documentation and test reports from authorized distributors to validate authenticity and performance consistency against datasheet parameters.

Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for critical applications. It serves as a direct replacement for through-hole 1N4679 devices where board space is limited. Ensure the design accommodates the DO-213AA footprint and thermal management needs associated with 500 mW dissipation in enclosed environments.

Part Context

This part belongs to the 1N4678/1N4679 series of Zener diodes manufactured by Microchip Technology. It represents the surface mount evolution of the traditional axial leaded 1N4679, maintaining identical electrical characteristics while offering a compact DO-213AA package suitable for modern PCB layouts and high-reliability industrial or military deployments.

Replacement Considerations

Direct functional equivalents include the standard 1N4679 axial leaded version for through-hole designs. For surface mount replacements, verify compatibility with other manufacturers' DO-213AA Zener diodes rated at 2V, 500mW, and ±5% tolerance, ensuring hermetic sealing is not strictly mandated if cost reduction is prioritized.