1N4946US/TR

Overview

The 1N4946US/TR is a fast recovery rectifier manufactured by Microchip Technology. It features a maximum repetitive peak reverse voltage of 600 V and an average forward rectified current of 1 A. The device exhibits a maximum forward voltage of 1.3 V at the rated current and a reverse leakage current of 1 µA at full reverse voltage. Its junction-to-case thermal resistance supports operation within a temperature range from -65°C to +175°C. The component utilizes a surface-mount SQ-MELF package.

Feature Summary

• Fast recovery characteristics suitable for high-frequency switching applications
• High-temperature capability with extended operating range up to 175°C
• Low reverse leakage current ensuring efficient blocking performance

Applications

• High-frequency power supply circuits
• Free-wheeling diode configurations in inductive loads
• General-purpose rectification in harsh environments

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with surface-mount assembly processes. Confirm RoHS status and environmental compliance requirements prior to integration into final designs.

Selection Notes

Select this component when high-temperature reliability and fast recovery are required in a compact surface-mount form factor. Compare thermal resistance values against system constraints. Verify that the 600V rating exceeds peak transient voltages in the target circuit application.

Part Context

This part belongs to the 1N49xx series of fast recovery rectifiers produced by Microchip Technology. The US suffix indicates a surface-mount variant, distinguishing it from through-hole axial packages like the JAN1N4946. These devices are designed for robust performance in demanding electronic environments.

Replacement Considerations

Consult official substitution lists for parameter-equivalent alternatives. Verify pinout compatibility and thermal characteristics before replacing.