1N4708UR-1

Overview

The 1N4708UR-1/TR is a single silicon Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 22 V with a tolerance of ±5%. The device has a maximum power dissipation of 500 mW and operates in the surface-mount DO-213AA (MELF) package. Key electrical parameters include a reverse leakage current of 10 nA at 16.7 V and a forward voltage of 1.1 V at 200 mA. The junction temperature range extends from -65°C to 175°C.

Feature Summary

• Provides stable voltage regulation for circuit protection applications
• Utilizes hermetically sealed glass MELF construction for durability
• Supports high operating temperatures up to 175°C

Applications

• Voltage regulation in electronic circuits
• Overvoltage protection systems
• Reference voltage generation

Procurement Notes

Verify the specific suffix against official Microchip documentation, as ordering codes may indicate variations in packaging or qualification status. Confirm that the DO-213AA package matches the target PCB footprint requirements. Ensure the component meets all necessary environmental compliance standards for the intended deployment environment before finalizing procurement decisions.

Selection Notes

Select this component when a 22 V regulation point is required in a compact surface-mount form factor. The DO-213AA package offers a small outline suitable for space-constrained designs. Consider the 500 mW power rating and ±5% voltage tolerance to ensure compatibility with the circuit's thermal and precision requirements.

Part Context

This part belongs to the 1N4708 series of Zener diodes produced by Microchip Technology. While the standard 1N4708 utilizes a through-hole DO-7 package, the UR-1 variant specifically denotes the surface-mount DO-213AA configuration. This distinction allows designers to choose between mounting technologies while maintaining consistent electrical characteristics.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4708 devices in the DO-213AA package. Verify pinout compatibility and thermal resistance values when considering alternatives from different suppliers to ensure equivalent performance in the application.