1N5551US/TR

Overview

The Microchip Technology 1N5551US/TR is a standard recovery rectifier designed for surface-mount applications. It features a single configuration with a maximum repetitive peak reverse voltage of 400 V and an average forward rectified current of 5 A. The device exhibits a maximum forward voltage drop of 1.2 V at the rated current and a low reverse leakage current of 1 µA at 400 V. It operates within a junction temperature range of -65°C to +175°C and utilizes a B-SQ-MELF-2 package.

Feature Summary

• Surface-mount construction in a hermetic B-SQ-MELF-2 package
• High thermal stability supporting extended operating temperatures up to 175°C
• Standard recovery characteristics suitable for general-purpose rectification

Applications

• Military and aerospace power supply circuits
• Harsh environment electronic systems
• High-reliability industrial rectification

Procurement Notes

Verify the specific suffix TR indicates tape-and-reel packaging when sourcing. Confirm that the component meets MIL-PRF-19500/420 specifications if military-grade performance is required. Ensure the B-SQ-MELF-2 footprint matches the design layout. Check for RoHS compliance status as indicated in official documentation. Validate availability through authorized distributors given potential supply constraints.

Selection Notes

Select this component for designs requiring robust surface-mount rectification in extreme thermal conditions. The 400 V rating provides adequate margin for common DC bus voltages. The 5 A current capacity supports moderate power levels. Consider the 2 µs reverse recovery time for switching frequency limitations. Compare against axial variants if board space allows for alternative mounting styles.

Part Context

This part belongs to the 1N555x series of standard recovery rectifiers manufactured by Microchip Technology. It serves as the surface-mount equivalent to traditional axial leaded diodes, offering similar electrical performance in a compact form factor. The series is widely utilized in applications demanding high reliability and proven semiconductor technology.

Replacement Considerations

The 1N5551US is the non-tape-and-reel variant of the same device. Verify package compatibility when substituting between reel and bulk formats.