1N5551

Overview

The Microchip Technology 1N5551 is a standard recovery rectifier diode designed for through-hole mounting in an axial B package. It features a maximum repetitive reverse voltage of 400 V and supports an average forward rectified current of 5 A. The device exhibits a typical reverse recovery time of 2 µs and maintains a low reverse leakage current of 1 µA at the rated voltage. Forward voltage drop is specified at 1.2 V under a 9 A test condition. Operating junction temperatures range from -65°C to +175°C, ensuring reliability across extreme thermal environments.

Feature Summary

• Military-grade qualification compliant with MIL-PRF-19500/420 specifications
• High thermal stability supporting operation up to 175°C junction temperature
• Robust axial leaded construction suitable for high-reliability through-hole applications

Applications

• Harsh environment power supply circuits
• Spacecraft and satellite electronic systems
• High-reliability industrial rectification modules

Procurement Notes

Verify that the specific order includes the JANTX or JAN prefix suffixes to ensure compliance with military quality standards. Confirm package type and reel specifications against the official datasheet before finalizing procurement. Ensure all documentation matches the manufacturer's part number exactly to avoid substitution errors.

Selection Notes

Select this component when high-voltage isolation and wide temperature tolerance are required. The 400 V rating provides sufficient margin for standard industrial AC line applications. Consider the 2 µs recovery speed for general-purpose frequency conversion rather than high-frequency switching scenarios.

Part Context

This component belongs to the 1N555x series of standard recovery rectifiers manufactured by Microchip Technology. It shares the same electrical baseline as commercial variants but undergoes rigorous screening and testing protocols mandated by military specifications. The series offers a range of voltage ratings while maintaining consistent current handling capabilities.

Replacement Considerations

Direct substitutes include other qualified parts within the 1N555x series such as the 1N5552 or 1N5553, provided their voltage ratings meet or exceed the circuit requirements. Verify that any replacement also holds the necessary military qualification if used in space or defense applications.