1N5554

Overview

The Microchip Technology 1N5554 is a standard recovery rectifier diode designed for through-hole mounting in an axial B-package configuration. It features a maximum repetitive reverse voltage of 1000 V and supports an average forward rectified current of 3 A at a lead temperature of +55°C. The device exhibits a low forward voltage drop of 1.2 V at 9 A and a maximum non-repetitive peak surge current capability of 100 A. Reverse leakage current is limited to 1 µA at the rated voltage, with a typical reverse recovery time of 2 µs. The component operates reliably within a junction temperature range of -65°C to +175°C.

Feature Summary

• High-temperature operation capability up to +175°C junction temperature
• Robust surge current handling with 100 A peak non-repetitive rating
• Low leakage current characteristics ensuring efficient blocking performance
• Standard axial package design suitable for traditional through-hole assembly

Applications

• General-purpose power supply rectification circuits
• Industrial equipment requiring high-voltage DC conversion
• Automotive electronics operating in harsh thermal environments
• Military and aerospace systems utilizing qualified silicon diodes

Procurement Notes

Verify the specific revision level and manufacturing date code upon order confirmation, as production cycles may extend significantly. Confirm RoHS compliance status explicitly, as this series often carries non-compliant markings due to legacy military specifications. Ensure that the ordering suffix matches the required packaging format, typically bulk for this part number. Cross-reference the datasheet version to confirm pinout consistency before finalizing procurement documentation.

Selection Notes

Select the 1N5554 when circuit designs demand high reverse voltage blocking capabilities combined with moderate continuous current ratings. This component is appropriate for applications where thermal management allows for junction temperatures reaching +175°C. Consider the axial leaded package constraints regarding PCB layout space compared to surface mount alternatives. Evaluate the 2 µs reverse recovery time against switching frequency requirements to ensure minimal switching losses in the target application environment.

Part Context

This component belongs to the 1N5550–1N5554 series of silicon power rectifiers manufactured by Microchip Technology. These devices are widely recognized in industrial and defense sectors for their reliability under extreme conditions. The 1N5554 specifically represents the highest voltage variant within this standard axial lineup, providing a robust solution for high-voltage DC applications where proven silicon technology is preferred over newer compound semiconductor options.

Replacement Considerations

The 1N5554US is a documented surface-mount equivalent offering similar electrical characteristics in a SQ MELF package. Verify mechanical fitment and thermal dissipation differences when substituting axial components with surface-mount variants. Ensure that any replacement maintains the same voltage and current ratings to preserve circuit integrity.