1N5811URS

Overview

The Microchip Technology 1N5811URS is a silicon ultrafast rectifier diode designed for surface-mount applications. It features a maximum repetitive reverse voltage of 150 V and an average forward rectified current of 3 A. The device exhibits a fast reverse recovery time of 30 ns, making it suitable for high-frequency switching operations. It operates within a junction temperature range of -65°C to +175°C and utilizes a hermetically sealed LCC-2B package.

Feature Summary

• Ultrafast switching capability with minimal reverse recovery time
• Hermetically sealed ceramic surface mount package
• High thermal conductivity materials for superior reliability
• Qualified for radiation-hardened and space applications

Applications

• Switching mode power supplies
• High frequency DC-to-DC converters
• Low voltage step-down chopper drives
• Secondary rectification circuits
• Reverse polarity protection

Procurement Notes

Verify the specific suffix 'URS' against official Microchip documentation to confirm exact packaging and qualification status. Ensure compatibility with existing PCB footprints for the LCC-2B package. Confirm radiation hardness requirements match the JANTX or JAN series specifications if used in aerospace contexts. Validate RoHS compliance status through the manufacturer's latest product change notifications.

Selection Notes

Select this component when high-frequency performance and radiation tolerance are critical. The 150 V rating suits low-voltage step-down applications. Consider the hermetic seal for harsh environments. Compare thermal resistance values against system heat dissipation capabilities. Ensure the 3 A current rating meets peak load requirements without exceeding junction temperature limits.

Part Context

This part belongs to the 1N5811 family of ultrafast rectifiers manufactured by Microchip Technology. It shares characteristics with other variants like the standard 1N5811 but differs in package type and environmental qualification. The URS suffix typically denotes a specific surface-mount configuration intended for automated assembly processes in demanding electronic systems.

Replacement Considerations

Direct substitutes include the JAN1N5811 for through-hole equivalents or the 1N5811U for similar surface-mount ultrafast rectifiers. Verify pinout compatibility and package dimensions before substitution. Ensure replacement parts meet the same radiation hardness and temperature ratings required by the original design.